PART 42—STANDARDS FOR CONDITION OF FOOD CONTAINERS Authority: Secs. 203, 205, 60 Stat. 1087, as amended, 1090, as amended (7 U.S.C. 1622, 1624). Subpart A—Definitions § 42.101 Meaning of words. Words used in this part in the singular form shall be considered to import the plural, or vice versa, as the case may demand. [31 FR 4687, Mar. 19, 1966; 31 FR 4949, Mar. 25, 1966; Redesignated at 42 FR 32514, June 27, 1977 and at 46 FR 63203, Dec. 31, 1981] § 42.102 Definitions, general. For the purpose of this part, unless the context otherwise requires, the following terms shall be construed, respectively, to mean: Acceptable Quality Level (AQL). Acceptance Number Administrator. Basic Inspection Period. Condition. Cumulative Sum Sampling (CuSum) Plan. (a) Acceptance Limit (“L”). (b) CuSum value. (c) Subgroup tolerance (“T”). (d) Starting value (“S”). Defect. Defect classifications. (a) Critical defect. (b) Major defect. (c) Minor defect. (d) Insignificant defect. Defective. Department. Double sampling. Lot or inspection lot. On-line sampling. Origin inspection. Primary container. (b) For On-line Sampling. Random sampling. Rejection number Sample. Sample size (n). Sample unit. Sampling plan. Secondary container. Shipping case. Single sampling. Stationary lot sampling. Subgroup. Total defects. User. [31 FR 4687, Mar. 19, 1966, as amended at 36 FR 18456, Sept. 15, 1971; 41 FR 42639, Sept. 28, 1976. Redesignated at 42 FR 32514, June 27, 1977, and further amended at 45 FR 69423, Oct. 21, 1980. Redesignated at 46 FR 63203, Dec. 31, 1981; 78 FR 57035, Sept. 17, 2013] Subpart B—Procedures for Stationary Lot Sampling and Inspection § 42.103 Purpose and scope. (a) This subpart outlines the procedure to be used to establish the condition of containers in stationary lots of packaged foods. This subpart shall be used to determine the acceptability of a lot based on specified acceptable quality levels and defects referenced in § 42.104 or any alternative plan which is approved by the Administrator. In addition, any other sampling plan in the tables with a larger first sample size than that indicated by the lot size range may be specified when approved by the Administrator. This subpart or approved alternative plan will be applied when a Government agency or private user of the inspection or grading services requests that filled primary containers or shipping cases, or both, be certified for condition. Unless the request for certification specifically asks that only the primary container or only the shipping case be examined, both containers will be examined. (b) Unless otherwise specified by the user of service, this subpart will not apply to inspection lots of less than 50 shipping cases or to inspection lots of less than 300 primary containers. When the primary container is the shipping case, the shipping case limit will apply. When the lot size exceeds either the 50 shipping case limit or the 300 primary container limit or both, the provisions of paragraph (a) of this section will apply. (c) Under certain conditions, special procedures (Skip Lot Sampling and Inspection) may be used to determine the condition of containers in stationary lots of packaged foods. Subpart C sets forth the requirements and procedures for Skip Lot Sampling and Inspection. [31 FR 4687, Mar. 19, 1966, as amended at 36 FR 18456, Sept. 15, 1971; 41 FR 42639, Sept. 28, 1976. Redesignated at 42 FR 32514, June 27, 1977, and further amended at 45 FR 69424, Oct. 21, 1980. Redesignated at 46 FR 63203, Dec. 31, 1981] § 42.104 Sampling plans and defects. (a) Sampling plans. (b) Defects. [31 FR 4687, Mar. 19, 1966, as amended at 36 FR 18456, Sept. 15, 1971. Redesignated at 42 FR 32514, June 27, 1977 and 46 FR 63203, Dec. 31, 1981] § 42.105 Basis for selection of sample. (a) Identification of lot. (1) The lot size (see § 42.103 for restriction on small lots); (2) The type and size of container; (3) The code marks or other identification marks and the number of containers represented by each mark. (4) The history of the lot regarding previous inspections; and (5) The inspection status (normal, tightened, or reduced). (b) Preliminary scanning. (c) Sample size. (1) Refer to the table in §§ 42.109 through 42.111 (sampling plans) and find where the lot size (number of individual containers) fits into the column headed “Lot Size Ranges.” (i) Tables I-A (normal), II-A (tightened), or III-A (reduced), as applicable, will apply to origin inspections, unless the contractor requests that corresponding single sampling plans be used. (ii) The appropriate double sampling plans in Table I will apply to other than origin inspections, unless the contractor requests that corresponding single sampling plans be used. (2) Select the appropriate sample size for the corresponding lot size range as indicated in the appropriate column headed “Sample Size.” (3) Lots rejected for unsatisfactory condition of containers may be subsequently sampled after being reconditioned or reworked. Such lots or resulting portion of a lot may be sampled as a reoffered lot providing the reoffered portion is separately identifiable. When making such inspections, the appropriate sampling plan for tightened inspection shall be used. Except in the case of an appeal inspection, it is not permissible to reinspect a previously rejected lot until it has been reconditioned or reworked. (d) Sample selection. (1) Proportional random sampling. (2) Simple random sampling. (e) Maximum sample units per case. (1) When containers are packed 12 or less to a case, draw a maximum of 6 sample units from any one case; and (2) When containers are packed more than 12 to a case but not more than 60, draw a maximum of 12 sample units from any one case; and (3) When containers are packed more than 60 to a case but not more than 250, draw a maximum of 16 sample units from any one case; and (4) When containers are packed more than 250 in a case, draw a maximum of 24 sample units from any one case. [31 FR 4687, Mar. 19, 1966, as amended at 36 FR 18456, Sept. 15, 1971. Redesignated at 42 FR 32514, June 27, 1977 and 46 FR 63203, Dec. 31, 1981] § 42.106 Classifying and recording defects. (a) Classifying defects. (1) Related defects are defects on a single container that are related to a single cause. If the initial incident causing one of the defects had not occurred, none of the other related defects on the container would be present. As an example of related defects, a can may be a leaker and the exterior may also be seriously rusted due to the leakage of the contents. In this case, the container is scored only once for these two defects since the rust condition can be attributed to the leak. Score the container according to whichever condition is the most serious. In this example, score as a “leaker” (a critical defect) and not as “pitted rust” (a major defect). (2) Unrelated defects are defects on a single container that result from separate causes. If the incident that caused one of the defects had not occurred, the other unrelated defects on the container would still be present. As an example of unrelated defects, a can may be seriously rusted, may have a bad dent along the seam, and the label may also be detached from the can because of improper gluing. In this case it is unlikely that any of the three defects exist because of a common cause. Therefore, they are considered unrelated defects and should be scored as three defects. (3) The lot acceptance portion of this procedure is based on the number of defects per 100 containers. It is necessary to determine if the defects on any one container are “related” defects or “unrelated” defects. A container is scored for the most serious of related defects, and is also scored for each unrelated defect. (b) Recording defects. (c) Totaling defects. [31 FR 4687, Mar. 19, 1966, as amended at 36 FR 18456, Sept. 15, 1971. Redesignated at 42 FR 32514, June 27, 1977 and 46 FR 63203, Dec. 31, 1981; 78 FR 57035, Sept. 17, 2013] § 42.107 Lot acceptance criteria. (a) The acceptability of the lot is determined by relating the number and class of defects enumerated on the worksheet to the acceptance and rejection numbers shown in §§ 42.109 through 42.111 for the respective sample size and Acceptable Quality Level (AQL). (b) Unless otherwise specified, use the following AQL's for the respective class of defects: Defect class AQL at origin inspection AQL at other than origin inspection Critical 0.25 0.25 Major 1.5 2.5 Total 6.5 10.0 (c) Refer to the appropriate sample size and AQL and compare the number of defects found in the sample with the acceptance (Ac) and rejection (Re) numbers in the sampling plan. (1) Accept the lot after examining the single sample or first sample of a double sampling plan when all of the following conditions are met: (i) The number of critical defects does not exceed the applicable acceptance number (Ac) for critical defects, and (ii) The number of major defects does not exceed the applicable acceptance number (Ac) for major defects, and (iii) The total number of critical, major, and minor defects does not exceed the applicable acceptance number (Ac) for total defects. (2) Reject the lot after examining the single sample or first sample of a double sampling plan when any one or more of the following conditions occur: (i) The number of critical defects equals or exceeds the applicable rejection number (Re) for critical defects, or (ii) The number of major defects equals or exceeds the applicable rejection number (Re) for major defects, or (iii) The total number of critical, major, and minor defects equals or exceeds the applicable rejection number (Re) for total defects. (3) If the lot can neither be accepted nor rejected on the first sample, when a double sampling plan is used, select and examine the prescribed second sample. Accept the lot if the accumulated defects of the first and second sample meet conditions of paragraph (c)(1) of this section, otherwise, reject the lot. [31 FR 4687, Mar. 19, 1966, as amended at 36 FR 18456, Sept. 15, 1971. Redesignated at 42 FR 32514, June 27, 1977 and 46 FR 63203, Dec. 31, 1981] § 42.108 Normal, tightened, or reduced inspection. (a) Normal inspection. (b) Tightened inspection. (c) Reduced inspection. (d) Switching rules. (1) Normal inspection to reduced inspection. (i) The preceding 10 inspection lots (or more, as indicated by the note to Table III-B) which have been inspected within the preceding 6 months have been on normal inspection and none has been rejected on original inspection; and (ii) The total number of defects in the samples from the preceding 10 inspection lots (or such other number of lots used for condition in paragraph (d)(1)(i) of this section) is equal to or less than the applicable number given in Table III-B. If a double sampling plan is used, all samples inspected should be included, not “first” samples only; and (2) Reduced inspection to normal inspection. (i) An inspection lot is rejected on original inspection; or (ii) Production becomes irregular (delayed or accelerated); or (iii) Other valid conditions warrant that normal inspection shall be reinstituted. (3) Normal inspection to tightened inspection. (4) Tightened inspection to normal inspection. (e) When the rules require a switch in the inspection status because of one or more classes of defects, all classes of defects shall be inspected under the new inspection criteria. At the option of the user of the service and when approved by the Administrator, such user may elect to remain on normal inspection when qualified for reduced inspection, or on tightened inspection when qualified for normal inspection. (f) Appeal inspection Appeal request. (2) How to file an appeal. (3) When an application for an appeal inspection may be refused. (4) Who shall perform the appeal. (5) Sampling procedures. (6) Appeal certificate. [31 FR 4687, Mar. 19, 1966, as amended at 36 FR 18456, Sept. 15, 1971. Redesignated at 42 FR 32514, June 27, 1977 and 46 FR 63203, Dec. 31, 1981] § 42.109 Sampling plans for normal condition of container inspection, Tables I and I-A. Table I—Single Sampling Plans for Normal Condition of Container Inspection Code Lot size ranges— Type of Plan Acceptable quality levels Origin Inspection Other Than Origin Inspection Sample size 0.25 1.5 6.5 0.25 2.5 10.0 Ac Re Ac Re Ac Re Ac Re Ac Re Ac Re CA 6,000 or less Single 84 0 1 3 4 9 10 0 1 4 5 13 14 CB 6,001-12,000 Single 168 1 2 5 6 16 17 1 2 7 8 23 24 CC 12,001-36,000 Single 315 2 3 8 9 28 29 2 3 13 14 41 42 CD Over 36,000 Single 500 3 4 12 13 42 43 3 4 18 19 62 63 CE Single 800 4 5 18 19 64 65 4 5 27 28 95 96 Ac = Acceptance number. Re = Rejection number. [78 FR 57035, Sept. 17, 2013] § 42.110 Sampling plans for tightened condition of container inspection; Tables II and II-A. Table II—Single Sampling Plans for Tightened Condition of Container Inspection Code Lot size ranges— Type of Plan Acceptable quality levels Origin Inspection Other Than Origin Inspection Sample Size 0.25 1.5 6.5 0.25 2.5 10.0 Ac Re Ac Re Ac Re Ac Re Ac Re Ac Re CB 6,000 or less Single 168 0 1 4 5 11 12 0 1 5 6 16 17 CC 6,001-12,000 Single 315 1 2 6 7 19 20 1 2 8 9 28 29 CD 12,001-36,000 Single 500 2 3 9 10 28 29 2 3 12 13 42 43 CE Over 36,000 Single 800 3 4 13 14 42 43 3 4 18 19 64 65 CF Single 1,250 4 5 19 20 63 64 4 5 26 27 96 97 [78 FR 57036, Sept. 17, 2013] § 42.111 Sampling plans for reduced condition of container inspection, Tables III and III-A; and limit number for reduced inspection, Table III-B. Table III—Single Sampling Plans for Reduced Condition of Container Inspection Code Lot size ranges— Type of Plan Acceptable quality levels Origin inspection Other Than Origin Inspection Sample Size 0.25 1.5 6.5 0.25 2.5 10.0 Ac Re Ac Re Ac Re Ac Re Ac Re Ac Re CAA 6,000 or less Single 29 1 2 1 2 4 5 1 2 2 3 5 6 CA 6,001-36,000 Single 84 1 2 3 4 9 10 1 2 4 5 13 14 CB Over 36,000 Single 168 1 2 5 6 16 17 1 2 7 8 23 24 CC Single 315 2 3 8 9 28 29 2 3 13 14 41 42 Table III-B—Limit Numbers for Reduced Inspection Number of sample units from last 10 lots inspected within 6 months Acceptable quality level 0.25 1.5 2.5 6.5 10.0 320-499 (*) 1 4 14 24 500-799 (*) 3 7 25 40 800-1,249 0 7 14 42 68 1,250-1,999 0 13 24 69 110 2,000-3,149 2 22 40 115 181 3,150-4,999 4 38 67 186 293 5,000-7,999 7 63 110 302 472 8,000-12,499 14 105 181 491 765 12,500-19,999 24 169 290 777 1207 * Denotes that the number of sample units from the last 10 inspection lots is not sufficient for reduced inspection for this AQL. In this instance more than 10 inspection lots may be used for the calculations if; the inspection lots used are the most recent ones in sequence within the last 6 months, they have all been on normal inspection, and none has been rejected on original inspection. [78 FR 57038, Sept. 17, 2013] § 42.112 Defects of containers: Tables IV, V, VI, VII, VIII, IX, and X. Table IV—Metal Containers [Rigid and semi-rigid] Defects Categories Critical Major Minor Type or size of container or component parts not as specified None permitted Closure incomplete, not located correctly or not sealed, crimped, or fitted properly: (a) Heat processed primary container 1 (b) Non-heat processed primary container 101 (c) Other than primary container 201 Dirty, stained, or smeared container 202 Key opening metal containers (when required): (a) Key missing 102 (b) Key does not fit tab 103 (c) Tab of opening band insufficient to provide accessibility to key 104 (d) Improper scoring (band would not be removed in one continuous strip) 105 Metal pop-top: (a) Missing or broken pull tab 106 (b) Missing or incomplete score line (not conforming to a relevant product specification) 107 Flexible pop-top: (a) Poor seal (wrinkle, entrapped matter, etc.) 108 (b) Short pull tab (not conforming to a relevant product specification) 203 (c) Missing pull tab 109 (d) Torn pull tab 204 Open top with plastic overcap (when required): (a) Plastic overcap missing 110 (b) Plastic overcap warped (making opening or reapplication difficult) 111 Outside tinplate or coating (when required): (a) Missing or incomplete 205 (b) Blistered, flaked, sagged, or wrinkled 206 (c) Scratched or scored 207 (d) Fine cracks 208 Rust (rust stain confined to the top or bottom double seam or rust that can be removed with a soft cloth is not scored a defect): (a) Rust stain 209 (b) Pitted rust 112 Wet cans (excluding refrigerated containers) 210 Dent: (a) Materially affecting appearance but not usability 211 (b) Materially affecting usability 113 Buckle: (a) Not involving end seam 212 (b) Extending into the end seam 114 Collapsed container 115 Paneled side materially affecting appearance but not usability 213 Solder missing when required 116 Cable cut exposing seam 117 Improper side seam 118 Swell, springer, or flipper (not applicable to gas or pressure packed product nor frozen products) 2 Leaker or blown container 3 Frozen products only: (a) Bulging ends 3 16 1 4 214 (b) Bulging ends more than 1 4 119 Metal drums: leaking filling seal (bung) swell 1 4 120 1 Table V—Composite Containers [Fiberboard body with metal lids or metal bottoms, plastic or foil top with cap] Defects Categories Critical Major Minor Type or size of container or component parts not as specified None permitted Closure incomplete, not located correctly or not sealed, crimped, or fitted properly 1 Dirty, stained, or smeared container 201 Easy open closure: (a) Pull tab: 1. Missing or broken pull tab 101 2. Missing or incomplete score line 102 (b) Membrane top: 1. Poor seal (wrinkle, entrapped matter, etc.) 103 2. Short pull tab 104 3. Missing pull tab 105 4. Torn pull tab 106 (c) Open top with plastic overcap (when required): 1. Plastic overcap missing 107 2. Plastic overcap warped (making opening or reapplication difficult) 108 Outside tinplate or coating on ends (when required): (a) Missing or incomplete 202 (b) Blistered, flaked, sagged, or wrinkled 203 (c) Scratched or scored 204 (d) Fine cracks 205 Collapsed container 109 Paneled side materially affecting appearance but not usability 206 Leaker 2 Wet or damp: (a) Materially affecting appearance but not usability 207 (b) Materially affecting usability 110 Crushed or torn area: (a) Materially affecting appearance but not usability 208 (b) Materially affecting usability 111 Table VI—Glass Containers [Bottles, Jars] Defects Categories Critical Major Minor Type or size of container or component parts not as specified None permitted Closure not sealed, crimped, or fitted properly: (a) Heat processed 1 (b) Non-heat processed 101 Dirty, stained, or smeared container 201 Chip in glass 202 Stone (unmelted material) in glass 203 Pits in surface of glass 204 Sagging surface 205 Bead (bubble within glass): (a) 1 8 1 16 206 (b) Exceeding 1 8 102 Checked 103 Thin spot in glass 104 Blister (structural defect) 105 Bird swing (glass appendage inside container) 2 Broken or leaking container 3 Cap (nonheat processed): (a) Cross-threaded 207 (b) Loose but not leaking 208 (c) Pitted rust 106 Cap (heat processed): (a) Cross-threaded or loose 4 (b) Pitted rust 107 Sealing tape or cello band (when required): (a) Improperly placed 209 (b) Not covering juncture of cap and glass 108 (c) Ends overlap by less than 1 2 109 (d) Loose or deteriorating 110 Missing or torn outer safety seal 111 Inner safety seal—missing, torn, poor seal 112 Table VII—Plastic Containers [Rigid and Semi-Rigid, Bottles, Jars, Tubs, Trays, Pails, etc.] Defects Categories Critical Major Minor Type or size of container or component parts not as specified None permitted Closure not sealed, crimped, or fitted properly: (a) Heat processed 1 (b) Non-heat processed 101 Dirty, stained, or smeared container 201 Chip in plastic 202 Un-melted gels in plastic 203 Pits in surface of plastic 204 Sagging surface 205 Air bubble within plastic: (a) 1 8 1 16 206 (b) Exceeding 1 8 102 Checked 103 Thin spot in plastic 104 Blister (structural defect) 105 Broken or leaking container 2 Cap (non-heat processed): (a) Cross-threaded 207 (b) Loose but not leaking 208 Cap (heat processed), cross-threaded or loose 3 Security seals: (a) Closure ring missing 106 (b) Missing or torn outer safety seal 107 (c) Inner safety seal—missing, torn, or poor seal 108 (d) Sealing tape or cello band (when required): 1. Improperly placed 209 2. Not covering juncture of cap and plastic 109 3. Ends overlap by less than 1 2 110 4. Loose or deteriorating 111 Table VIII—Rigid and Semi-Rigid Containers—Corrugated or Solid Fiberboard, Chipboard, Wood, Paperboard Aseptic Cartons, Polymeric Trays, etc. [Excluding metal, glass, and plastic] Defects Categories Critical Major Minor Type or size of container or component parts not as specified None permitted Component part missing 101 Closure not sealed, crimped, or fitted properly: (a) Primary container 1 (b) Other than primary container 201 Dirty, stained, or smeared container 202 Wet or damp (excluding ice packs): (a) Materially affecting appearance but not usability 203 (b) Materially affecting usability 102 Moldy area 2 Crushed or torn area: (a) Materially affecting appearance but not usability 204 (b) Materially affecting usability 103 Separation of lamination (corrugated fiberboard): (a) Materially affecting appearance but not usability 205 (b) Materially affecting usability 104 Product sifting or leaking 105 Nails or staples (when required): (a) Not as required, insufficient number or improperly positioned 206 (b) Nails or staples protruding 106 Glue or adhesive (when required); not holding properly, not covering area specified, or not covering sufficient area to hold properly: (a) Primary container 107 (b) Other than primary container 207 Flap: (a) Projects beyond edge of container more than 1 4 208 (b) Does not meet properly, allowing space of more than 1 4 209 Sealing tape or strapping (when required): (a) Missing 108 (b) Improperly placed or applied 210 Missing component (straw, etc.) 211 Paperboard Aseptic Cartons: (a) Missing re-sealable cap or tab 109 (b) Inner or outer safety seal—missing, torn, poor seal 3 Thermostabilized polymeric trays: Tray body: (a) Swollen container 4 (b) Tear, crack, hole, abrasion through more than one layer of multi-layer laminate for the tray 5 (c) Presence of delamination in multi-layered laminate 212 (d) Presence of any permanent deformation, such that deformed area is discolored or roughened in texture 213 Lid material: (a) Closure seal not continuous along tray flange surface 6 (b) Foldover wrinkle in seal area extends into the closure seal such that the closure seal is reduced to less than 1 8 7 (c) Any impression or design on the seal surfaces which conceals or impairs visual detection of seal defects 110 (d) Areas of “wave-like” striations or wrinkles along the seal area that spans the entire width of seal 214 (e) Abrasion of lid material: 1. Within 1 16 8 2. Greater than 1 16 215 (f) Presence of entrapped matter within 1 16 1 16 1 16 9 (g) Presence of any seal defect or anomaly (for example, entrapped moisture, gases, etc.) within 1 16 111 (h) Closure seal width less than 1 8 216 Table IX—Flexible Containers [Plastic, Cellophane, Paper, Textile, Laminated Multi-Layer Pouch, Bag, etc.] Defects Categories Critical Major Minor Type or size of container or component parts not as specified None permitted Closure not sealed, crimped, stitched, or fitted properly: (a) Heat processed primary container 1 (b) Non-heat processed primary container 101 (c) Other than primary container 201 Dirty, stained, or smeared container 202 Unmelted gels in plastic 203 Torn or cut container or abrasion (non-leaker): (a) Materially affecting appearance but not usability 204 (b) Materially affecting usability 102 Moldy area 2 Individual packages sticking together or to shipping case (tear when separated) 103 Not fully covering product 104 Wet or damp (excluding ice packs): (a) Materially affecting appearance but not usability 205 (b) Materially affecting usability 105 Over wrap (when required): (a) Missing 106 (b) Loose, not sealed, or closed 206 (c) Improperly applied 207 Sealing tape, strapping, or adhesives (when required): (a) Missing 107 (b) Improperly placed, applied, torn, or wrinkled 208 Tape over bottom and top closures (when required): (a) Not covering stitching 108 (b) Torn (exposing stitching) 109 (c) Wrinkled (exposing stitching) 110 (d) Not adhering to bag: 1. Exposing stitching 111 2. Not exposing stitching 209 (e) Improper placement 210 Product sifting or leaking: (a) Non-heat processed 112 (b) Heat processed 3 Flexible pop-top: (a) Poor seal (wrinkle, entrapped matter, etc.) reducing intact seal to less than 1 16 4 (b) Short pull tab (materially affecting usability) 212 (c) Missing pull tab 113 (d) Torn pull tab (materially affecting usability) 213 Missing component (straw, etc.) 214 Two part container (poly lined box or bag in box): (a) Outer case torn 215 (b) Poly liner: 1. Missing 5 2. Improper closure 114 Missing “zip lock” (re-sealable containers) 216 Loss of vacuum (in vacuum-packed) 115 Pre-formed containers: (a) Dented or crushed area 217 (b) Deformed container 218 Missing re-sealable cap 116 Inner or outer safety seal—missing, torn, poor seal 6 Air bubble in plastic 117 Thermostabilized products (includes but not limited to tubes, pouches, etc.): Foldover wrinkle in seal area (thermostabilized pouches): (a) Extends through all plies across seal area or reduces seal less than 1 16 7 (b) Does not extend through all plies and effective seal is 1 16 219 Incomplete seal (thermostabilized pouches) 8 Non-bonding seal (thermostabilized pouches) 9 Laminate separation in body of pouch or in seal within 1 16 (a) If food contact layer is exposed 10 (b) If food contact surface is exposed after manipulation or laminate separation expands after manipulation 118 (c) If lamination separation is limited to isolated spots that do not propagate with manipulation or is outer ply separation in seal within 1 16 220 Flex cracks (cracks in foil layer only) 221 Swollen container 11 Blister (in seal) reducing intact seal to less than 1 16 12 Compressed seal (overheated to bubble or expose inner layer) reducing intact seal to less than 1 16 13 Stringy seal (excessive plastic threads showing at edge of seal area) 222 Contaminated seal (entrapped matter) reducing intact seal to less than 1 16 14 Seal creep (product in pouch “creeping” into seal) reducing intact seal to less than 1 16 15 Misaligned or crooked seal reducing intact seal to less than 1 16 16 Seal formed greater than 1-inch from edge of pouch (unclosed edge flaps) 223 Waffling (embossing on surface from retort racks; not scorable unless severe) 224 Poor or missing tear notch (when required) 225 Table X—Unitizing [Plastic or other type of casing/unitizing] Defects Categories Major Minor Not specified method 101 Missing tray (when required) 102 Missing shrink wrap (when required) 103 Loose or improperly applied wrap 201 Torn or mutilated 202 Off-center wrap (does not overlap both ends) 203 [78 FR 57041, Sept. 17, 2013] § 42.113 Defects of label, marking, or code. Table XI—Label, Marking, or Code Defects Categories Major Minor Not specified method 101 Missing (when required) 102 Loose or improperly applied 201 Torn or mutilated 202 Torn or scratched, obliterating any markings on the label 103 Text illegible or incomplete 203 Incorrect 104 In wrong location 204 [78 FR 57046, Sept. 17, 2013] § 42.114 Procedures for evaluating interior container defects. (a) Sections 42.101-42.136 provide procedures for determining lot conformance with the U.S. Standards for Condition of Food Containers. This determination is based on the examination of the external characteristics of the food containers. (b) As an option, if a user of the inspection service requests to have the interior characteristics of containers examined, and apply these results in the determination of lot acceptability, the defects listed in Table XII may be used. (c) The determination of lot acceptability based on internal container defects shall be independent of the determination of lot acceptability for U.S. Standards for Condition of Food Containers. A user of the inspection service may choose to require inspection for internal can defects as well as inspection for U.S. Standards for Condition of Food Containers. (d) If a user of the inspection service requests an examination for internal container defects in addition to an official USDA/USDC inspection for product quality and/or U.S. grade, the containers opened by the official inspection service for inspection of product quality and/or U.S. grade will be used for examination of interior container defects. The minimum sample size for evaluation of interior container defects will be 13 containers. As a result, additional containers will be required if the inspection for quality or U.S. grade calls for fewer than 13 containers. Table XIII provides acceptance numbers for internal container defects for selected sample sizes. Table XII—Interior Container Defects Defects Categories Major Minor De-tinning in metal container materially affecting usability 101 De-tinning in metal container not materially affecting usability 201 Black spots in metal container 202 Enamel missing (when required) in metal container 102 Enamel breakdown in metal container material affecting usability 103 Enamel breakdown in metal container material not affecting usability 203 Other defect(s) of the interior of the container (metal, plastic, paper, rigid, etc.) e.g., interior damage, tear, delamination, missing layer, off-odor, interior blisters, etc. that materially affects usability 104 Defect(s) of the interior of the container (metal, plastic, paper, rigid, etc.) e.g., interior damage, tear, delamination, missing layer, off-odor, interior blisters, etc. that materially affects appearance but not usability 204 Table XIII—Acceptance Numbers for Internal Container Defects Sample Size (n = number of containers) Major Total Interior Defects Interior Defects Ac Re Ac Re n—13 0 1 2 3 n—21 1 2 3 4 n—29 1 2 4 5 n—38 2 3 5 6 n—48 2 3 6 7 n—60 2 3 7 8 [78 FR 57046, Sept. 17, 2013] Subpart C—Skip Lot Sampling and Inspection Procedures Source: 41 FR 42639, Sept. 28, 1976, unless otherwise noted. Redesignated at 42 FR 32514, June 27, 1977, and further redesignated at 46 FR 63203, Dec. 31, 1981. § 42.120 Description and qualification. Skip lot sampling and inspection are special procedures for inspecting stationary lots in which only one-half or one-fourth of the lots offered for inspection are formally inspected. Skip lot sampling and inspection procedures may be instituted only when all of the following conditions are met: (a) When authorized by the Administrator and acceptable to the user and producer, if different from the user. (b) When inspection is origin inspection (see § 42.102). (c) When all lots can be expected to be of essentially the same quality. (d) When lots from the producer are currently on, or eligible to be on, either normal or reduced inspection. § 42.121 Sampling and inspection procedures. (a) Following skip lot procedure authorization, inspect every lot consecutively offered for inspection using normal inspection procedures as set forth in Subpart B of this part. When 10 consecutive lots are acceptable, inspect only one-half of the lots offered for inspection using normal inspection procedures. While on the one-half inspection rate, when 10 consecutively inspected lots are acceptable, inspect only one-fourth of the lots offered for inspection using normal inspection procedures. While on the one-half or one-fourth inspection rate, if any formally inspected lot is unacceptable, revert immediately to the inspection of every lot using normal inspection procedures and recommence the above procedure. See § 42.123 for a flow diagram of the skip lot sampling plan. (b) Two exceptions to the procedures in paragraph (a) of this section are as follows: (1) The skip lot sampling and inspection rate of one-half can be instituted immediately if the lots from the producer are currently on, or eligible to be on, reduced inspection and all other conditions in § 42.120 are met. After skip lot sampling and inspection begins, however, only normal inspection is permitted. (2) While inspecting every lot consecutively as offered for inspection, i.e., while not on the one-half or one-fourth sampling and inspection rate, if requirements for switching from normal to tightened inspection are met as specified in § 42.108 then skip lot procedures terminate, tightened inspection is initiated, and stationary lot sampling and inspection procedures in Subpart B are instituted. Skip lot procedures may be instituted again only when all conditions of § 42.120 are met. (c) All lot selections for the one-half and one-fourth inspection rates must be strictly random (for example, not every other lot or every fourth lot). Use of random number tables, coin flipping, or numbered cards is encouraged. (d) Preliminary scanning procedures (see § 42.105) shall be used on all lots scheduled for formal inspection and also shall be used on lots not scheduled for inspection (“skipped” lots) whenever the inspector feels such action is prudent to further insure the acceptability of such lots. § 42.122 Applicability of other procedures. Whenever appropriate, the procedures for classifying and recording defects in § 42.106 and for appeal inspections in § 42.108 also apply to skip lot sampling and inspection. § 42.123 Flow diagram for skip lot sampling and inspection. Notes: 1. Only normal inspection is permitted. 2. All lot selections for the one-half and one-fourth sampling rates must be strictly random (for example, not every other lot or every fourth lot). 3. Two exceptions to the procedures shown above are as follows: (a) The skip lot sampling and inspection rate of one-half can be instituted immediately if the lots from the producer are currently on, or eligible to be on, reduced inspection and all other conditions in § 42.120 are met. When skip lot inspection begins, however, only normal inspection is permitted. (b) While inspecting every lot consecutively as offered for inspection, i.e., while not on the one-half or one-fourth rate, if requirements for switching from normal to tightened inspection are met as specified in § 42.108 then skip lot procedures terminate, tightened inspection is initiated, and stationary lot sampling and inspection procedures in Subpart B are instituted. Skip lot procedures may be instituted again only when all conditions of § 42.120 are met. Subpart D—On-Line Sampling and Inspection Procedures Authority: Sec. 203, 205, 60 Stat. 1087, as amended, 1090, as amended (7 U.S.C. 1622, 1624). Source: 45 FR 69428, Oct. 21, 1980, unless otherwise noted. Redesignated at 46 FR 63203, Dec. 31, 1981. § 42.130 Description and qualifications. (a) In many instances, food containers are loaded directly into carriers immediately after final packaging. This situation makes stationary lot sampling and inspection impractical. For such circumstances, the optional procedure for on-line sampling and inspection using cumulative sum sampling plans is provided. On-line sampling and inspection is a procedure in which subgroups of sampling units are selected randomly from predesignated portions of production. The acceptability of the portions of production is determined by inspecting, at the time of the sampling, the subgroups which represent these portions. On-line sampling and inspection contrasts with stationary lot procedures in which sample units are selected randomly and inspected and lot acceptability determinations are made only after lot production is completed. (b) On-line sampling and inspection procedures may be instituted only when all of the following conditions are met: (1) When authorized by the Administrator and acceptable to the user and producer, if different from the user. (2) When inspection is origin inspection (see § 42.102). (3) When previous production lots from the producer are currently on, or eligible to be on, either normal or reduced inspection. (When shifting from stationary lot sampling and inspection to on-line sampling and inspection, normal on-line inspection shall be initially used.) (4) When inspection of the containers is performed at a point after which all condition of container related characteristics are fixed and will not be subject to change during final handling. § 42.131 Selection of samples. (a) Prior to commencement of on-line sampling and inspection, the total amount of production for a given day or shift is predicted and is then subdivided into conveniently designated portions of production approximately equal in size. Portions may be designated by sequential numbers (e.g., containers 1 through 500 are portion 1, containers 501 through 1000 are portion 2, etc.) or by time intervals (e.g., the first half hour of production is portion 1, the second half hour of production is portion 2, etc.) during which the containers are identified by individual production codes for each time interval. (b) Determine the number of sample units in a subgroup as follows: Type of Inspection and Number of Sample Units Normal—25 Tightened—50 Reduced—13 (c) Subgroups are drawn randomly from portions of production throughout the production process and are inspected for defects. The drawing of sampling units may be done in either of two ways: (1) The number of sample units (13, 25 or 50) comprising a subgroup may be drawn at the same time from a randomly chosen point in the production of each portion, or (2) sample units may be drawn individually, but in a random manner, throughout the production of each portion. At least 6 subgroups must be obtained during each basic inspection period regardless of the system used to designate portions of production. (d) A shift to on-line sampling plans from stationary lot sampling plans (or vice versa) during a basic inspection period is not permitted. § 42.132 Determining cumulative sum values. (a) The parameters for the on-line cumulative sum sampling plans for AQL's applicable to origin inspection are as follows: Acceptable quality levels Type of inspection Normal Tightened Reduced T L S T L S T L S 0.25 0.05 0.95 0.35 0.1 0.9 0.3 0 0 0 1.5 0.5 2 1 0.8 1.6 0.4 0.5 0.5 0 6.5 2 3 1 2.5 3 1 1 2 1 (b) At the beginning of the basic inspection period, the CuSum value is set equal to the starting value (“S”) for the specified CuSum plan. The CuSum value is then determined for each consecutive subgroup as follows: (1) Add the number of defects for the present subgroup to the CuSum value of the previous subgroup. (2) Subtract the subgroup tolerance (“T”). (3) The CuSum value is reset in the following situations; however, determine portion of production acceptability (see § 42.133) prior to resetting the CuSum value: (i) Reset the CuSum value to zero (0) if the CuSum value is less than zero (0). (ii) Reset the CuSum value to the acceptance limit (“L”) if the CuSum value exceeds the acceptance limit (“L”). § 42.133 Portion of production acceptance criteria. (a) The acceptability of a portion of production is determined by comparing the calculated CuSum value with the acceptance limit (“L”) for the specified AQL. (b) A portion of production is acceptable if the CuSum value, calculated from the subgroup representing that portion, is equal to or less than the acceptance limit (“L”) for all classes of defects. (c) A portion of production is rejected if the CuSum value, calculated from the subgroup representing that portion, exceeds the acceptance limit (“L”) for one or more classes of defects. § 42.134 Disposition of rejected portions of production. Rejected portions of production from the same basic inspection period may be reworked, combined together to form a lot, and resubmitted for inspection under the criteria for tightened inspection using stationary lot sampling procedures described in subpart B of this part. § 42.135 Normal, tightened or reduced on-line inspection. (a) Normal, tightened and reduced on-line sampling plans are specified in § 42.132 (Determining cumulative sum values). Normal plans shall be used except when the history of inspection permits reduced inspection or requires tightened inspection. (b) Switching rules: Normal on-line inspection procedures shall be followed except when conditions in paragraph (b) (1) or (3) of this section are applicable or unless otherwise specified. Application of the following switching rules will be restricted to the inspection of production for one applicant at a single production location and will be based upon records of original inspections of production (excluding resubmitted portions previously rejected and reworked) at that same location. (1) Normal inspection to reduced inspection. (i) The preceding 40 consecutive portions of production have been on normal inspection and no more than one of these portions has been rejected on original inspection; and (ii) The total number of defects in the subgroups (1000 sample units) from these preceding 40 consecutive portions of production is less than or equal to the following limit numbers for the specified AQL's: Acceptable quality levels Limit No. 0.25 0 1.5 9 6.5 54 (2) Reduced inspection to normal inspection. (i) More than one portion of production in any 40 consecutive portions of production is rejected on original inspection; or (ii) Production becomes irregular (delayed or accelerated); or (iii) Other valid conditions warrant that normal inspection shall be reinstituted. (3) Normal inspection to tightened inspection. (4) Tightened inspection to normal inspection. (c) When the rules require a switch in the inspection status because of one or more classes of defects, all classes of defects shall be inspected under the new inspection criteria. At the option of the user of the service, and when approved by the Administrator, such user may elect to remain on normal inspection when qualified for reduced inspection, or on tightened inspection when qualified for normal inspection. § 42.136 Applicability of other procedures. When appropriate, the procedures for classifying and recording defects in § 42.106 and for appeal inspections in § 42.108 also apply to on-line sampling and inspection. Subpart E—Miscellaneous Authority: Agricultural Marketing Act of 1946, as amended (7 U.S.C. 1621 et seq. § 42.140 Operating Characteristic (OC) curves for on-line sampling and inspection. (a) This section contains the Operating Characteristic (OC) curve for each of the sampling plans given in Tables I, I-A, II, II-A, III, and III-A. The OC curve and the corresponding sampling plans are listed by AQL. (b) Different acceptance and rejection criteria are provided for each AQL. The criteria for each AQL must be obtained from the applicable sampling plan tables. (c) The curves show the ability of the various sampling plans to distinguish between good and bad lots. This can be illustrated by examining OC curve 6 for an AQL of 0.25 defects per hundred units in the Reduced and Normal Inspection Plans. If the quality of the lots submitted for inspection is poorer than the AQL of 0.25 defects per hundred units, fewer lots will be accepted. For example, OC curve 6 shows that when the quality of lots submitted for inspection is 1.0 defects per hundred units, only 26 percent of the lots are expected to be accepted. Conversely when the quality of the lots submitted for inspection is better than the AQL of 0.25 defects per hundred units, most lots are expected to be accepted. For example, the same OC curve 6 shows that when the quality of lots submitted for inspection is 0.10 defects per hundred units, about 99 percent of the lots are expected to be accepted. (d) The table of sampling plans that correspond to OC curve 6 can be found over the curves for an AQL of 0.25 defects per hundred units in the Reduced and Normal Inspection Plan. An examination of this table reveals that there is one single and one double sampling plan that have OC curves comparable to OC curve 6. The first plan listed is a single plan requiring the inspection of 500 individual containers. Under this plan the lot is accepted as meeting the requirements for an AQL of 0.25 if there are 3 or less defects in the sample or rejected if there are 4 or more defects in the sample. (e) The next plan that is listed in the column headed 6 for an AQL of 0.25 is a double sampling plan that requires the initial inspection of 228 individual containers. The lot will be accepted as meeting the requirements of an AQL of 0.25 if there are no defects in the sample, and rejected if there are 3 or more defects in the sample. In the event that the number of defects is between the acceptance (0) and rejection (3) numbers, additional containers must be inspected. In this case, the table indicates that a total of 516 containers must be inspected before a decision can be made to either accept or reject the lot. This will require the inspection of 288 more containers (516 − 228 = 288). If there are 3 or less defects in the total sample, the lot will be accepted. If there are 4 or more defects in the total sample, the lot will be rejected. The other double sampling plans operate in a similar manner with the only differences being the sample sizes and acceptance and rejection numbers. Reduced and Normal Inspection Plans—Sampling Plans and Operating Characteristic (OC) Curves for AQL = 0.15 Defects per Hundred Units [Sampling plans—AQL = 0.15] Comparable sampling plans Identification number of OC curve R1 R2 R3 R4 N4 N5 N6 N7 N8 n c Ac Re n c Ac Re n c Ac Re n c Ac Re n c Ac Re n c Ac Re n c Ac Re n c Ac Re n c Ac Re Single 29 1 2 84 1 2 126 0 1 315 1 2 168 1 2 264 1 2 500 2 3 800 3 4 1,250 4 5 Double 18 0 2 36 0 2 120 0 2 174 0 2 252 0 3 456 0 4 36 1 2 96 1 2 180 1 2 336 1 2 540 2 3 864 3 4 n c Tightened Inspection Plans—Sampling Plans and Operating Characteristic (OC) Curves for AQL = 0.15 Defects per Hundred Units [Sampling plans—AQL = 0.15] Comparable sampling plans Identification number of OC curves 1 2 3 4 n c Ac Re n c Ac Re n c Ac Re n c Ac Re Single 264 0 1 500 1 2 800 2 3 1,250 3 4 Double 360 0 2 456 0 3 576 0 3 516 1 2 864 2 3 1,296 3 4 n c Reduced and Normal Inspection Plans—Sampling Plans and Operating Characteristic (OC) Curves for AQL = 0.25 Defects per Hundred Units [Sampling plans—AQL = 0.25] Comparable sampling plans Identification number OC curves R1 N2 R3 N and R4 N and R5 N6 N7 n c Ac Re n c Ac Re n c Ac Re n c Ac Re n c Ac Re n c Ac Re n c Ac Re Single 29 1 2 84 0 1 84 1 2 168 1 2 315 2 3 500 3 4 800 4 5 Double 18 0 2 36 0 2 120 0 2 168 0 3 228 0 3 18 1 2 96 1 2 180 1 2 348 2 3 516 3 4 n c Tightened Inspection Plans—Sampling Plans and Operation Characteristics (OC) Curves for AQL = 0.25 Defects per Hundred Units [Sampling plans—AQL = 0.25] Comparable sampling plans Identification number of OC curves 1 2 3 4 5 n c Ac Re n c Ac Re n c Ac Re n c Ac Re n c Ac Re Single 168 0 1 315 1 2 500 2 3 800 3 4 1,250 4 5 Double 168 0 2 228 0 3 456 0 4 348 1 2 516 2 3 864 3 4 n c Reduced and Normal Inspection Plans—Sampling Plans and Operating Characteristic (OC) Curves for AQL = 0.50 Defects per Hundred Units [Sampling plans—AQL = 0.50] Comparable sampling plans Identification number of OC curves R1 N and R2 N and R3 N and R4 N5 N6 n c Ac Re n c Ac Re n c Ac Re n c Ac Re n c Ac Re n c Ac Re Single 29 1 2 84 1 2 168 2 3 315 3 4 500 5 6 800 7 8 Double 18 0 2 36 0 2 120 0 3 168 0 4 228 0 5 36 1 2 96 1 2 180 2 3 348 3 4 516 5 6 n c Tightened Inspection Plans—Sampling Plans and Operating Characteristic (OC) Curves for AQL = 0.50 Defects per Hundred Units [Sampling plans—AQL = 0.50] Comparable sampling plans Identification number of OC curves 1 2 3 4 5 n c Ac Re n c Ac Re n c Ac Re n c Ac Re n c Ac Re Single 168 1 2 315 2 3 500 3 4 800 4 5 1,250 6 7 Double 120 0 2 168 0 3 228 0 3 456 1 5 180 1 2 348 2 3 516 3 4 864 4 5 n c Reduced and Normal Inspection Plans—Sampling Plans and Operating Characteristic (OC) Curves for AQL = 1.00 Defects per Hundred Units [Sampling plans—AQL = 1.00] Comparable sampling plans Identification number of OC curves R1 N and R2 N and R3 N and R4 N5 N6 n c Ac Re n c Ac Re n c Ac Re n c Ac Re n c Ac Re n c Ac Re Single 29 1 2 84 2 3 168 4 5 315 6 7 500 9 10 800 13 14 Double 18 0 2 36 0 3 120 2 5 168 1 5 228 2 7 36 1 2 96 2 3 180 4 5 348 7 8 516 9 10 n c Tightened Inspection Plans—Sampling Plans and Operating Characteristic (OC) Curves for AQL = 1.00 Defects per Hundred Units [Sampling plans—AQL = 1.00] Comparable sampling plans Identification number of OC curves 1 2 3 4 5 n c Ac Re n c Ac Re n c Ac Re n c Ac Re n c Ac Re Single 168 2 3 315 3 4 500 5 6 800 7 8 1,250 10 11 Double 120 0 3 168 0 4 228 0 5 456 2 6 180 2 3 348 3 4 516 5 6 864 8 9 n c Reduced and Normal Inspection Plans—Sampling Plans and Operating Characteristic (OC) Curves for AQL = 1.50 Defects per Hundred Units [Sampling plans—AQL = 1.50] Comparable sampling plans Identification number of OC curves R1 N and R2 N and R3 N and R4 N5 N6 n c Ac Re n c Ac Re n c Ac Re n c Ac Re n c Ac Re n c Ac Re Single 29 1 2 84 3 4 168 5 6 315 8 9 500 12 13 800 18 19 Double 18 0 2 36 0 4 120 2 6 168 2 7 228 3 9 36 1 2 96 3 4 180 5 6 348 9 10 516 12 13 n c Tightened Inspection Plans—Sampling Plans and Operating Characteristic (OC) Curves for AQL = 1.50 Defects per Hundred Units [Sampling plans—AQL = 1.50] Comparable sampling plans Identification number of OC curves 1 2 3 4 5 n c Ac Re n c Ac Re n c Ac Re n c Ac Re n c Ac Re Single 168 4 5 315 6 7 500 9 10 800 13 14 1,250 19 20 Double 120 2 5 168 1 5 228 2 7 456 5 10 180 4 5 348 7 8 516 9 10 864 14 15 n c Reduced and Normal Inspection Plans—Sampling Plans and Operating Characteristic (OC) Curves for AQL = 2.50 Defects per Hundred Units [Sampling plans—AQL = 2.50] Comparable sampling plans Identification number of OC curves R1 N and R2 N and R3 N and R4 N5 N6 n c Ac Re n c Ac Re n c Ac Re n c Ac Re n c Ac Re n c Ac Re Single 29 2 3 84 4 5 168 7 8 315 13 14 500 18 19 800 27 28 Double 18 0 3 36 0 4 120 3 7 168 5 10 228 5 11 36 2 3 96 4 5 180 8 9 348 14 15 516 19 20 n c Tightened Inspection Plans—Sampling Plans and Operating Characteristic (OC) Curves for AQL = 2.50 Defects per Hundred Units [Sampling plans—AQL = 2.50] Comparable sampling plans Identification number of OC curves 1 2 3 4 5 n c Ac Re n c Ac Re n c Ac Re n c Ac Re n c Ac Re Single 168 5 6 315 8 9 500 12 13 800 18 19 1,250 26 27 Double 120 2 6 168 2 7 228 3 9 456 8 13 180 5 6 348 9 10 516 12 13 864 19 20 n c Reduced and Normal Inspection Plans—Sampling Plans and Operating Characteristic (OC) Curves for AQL = 4.00 Defects per Hundred Units [Sampling plans—AQL = 4.00] Comparable sampling plans Identification number of OC curves R1 N and R2 N and R3 N and R4 N5 N6 n c Ac Re n c Ac Re n c Ac Re n c Ac Re n c Ac Re n c Ac Re Single 29 3 4 84 6 7 168 11 12 315 19 20 500 28 29 800 42 43 Double 18 1 3 36 0 5 120 6 10 168 7 13 228 8 17 36 4 5 96 7 8 180 12 13 348 21 22 516 29 30 n c Tightened Inspection Plans—Sampling Plans and Operating Characteristic (OC) Curves for AQL = 4.00 Defects per Hundred Units [Sampling plans—AQL = 4.00] Comparable sampling plans Identification number of OC curves 1 2 3 4 5 n c Ac Re n c Ac Re n c Ac Re n c Ac Re n c Ac Re Single 168 7 8 315 13 14 500 18 19 800 27 28 1,250 41 42 Double 120 3 7 168 5 10 228 5 11 456 12 19 180 8 9 348 14 15 516 19 20 864 29 30 n c Reduced and Normal Inspection Plans—Sampling Plans and Operating Characteristic (OC) Curves for AQL = 2.50 Defects per Hundred Units [Sampling plans—AQL = 6.50] Comparable sampling plans Identification number of OC curves R1 N and R2 N and R3 N and R4 N5 N6 n c Ac Re n c Ac Re n c Ac Re n c Ac Re n c Ac Re n c Ac Re Single 29 4 5 84 9 10 168 16 17 315 28 29 500 42 43 800 64 65 Double 18 1 4 36 2 7 120 10 14 168 12 18 228 15 24 36 5 6 96 10 11 180 17 18 348 31 32 516 43 44 n c Tightened Inspection Plans—Sampling Plans and Operating Characteristic (OC) Curves for AQL = 6.50 Defects per Hundred Units [Sampling plans—AQL = 6.50] Comparable sampling plans Identification number of OC curves 1 2 3 4 5 n c Ac Re n c Ac Re n c Ac Re n c Ac Re n c Ac Re Single 168 11 12 315 19 20 500 28 29 800 42 43 1,250 63 64 Double 120 6 10 168 7 13 228 8 17 456 21 28 180 12 13 348 21 22 516 29 30 864 44 45 n c Reduced and Normal Inspection Plans—Sampling Plans and Operating Characteristic (OC) Curves for AQL = 10.00 Defects per Hundred Units [Sampling plans—AQL = 10.00] Comparable sampling plans Identification number of OC curves R1 N and R2 N and R3 N and R4 N5 N6 n c Ac Re n c Ac Re n c Ac Re n c Ac Re n c Ac Re n c Ac Re Single 29 5 6 84 13 14 168 23 24 315 41 42 500 62 63 800 95 96 Double 18 2 5 36 3 9 120 14 19 168 19 26 228 23 34 36 6 7 96 15 16 180 25 26 348 45 46 516 64 65 n c Tightened Inspection Plans—Sampling Plans and Operating Characteristic (OC) Curves for AQL = 10.00 Defects per Hundred Units [Sampling plans—AQL = 10.00] Comparable sampling plans Identification number of OC curves 1 2 3 4 5 n c Ac Re n c Ac Re n c Ac Re n c Ac Re n c Ac Re Single 168 16 17 315 28 29 500 42 43 800 64 65 1,250 96 97 Double 120 10 14 168 12 18 228 15 24 456 32 41 180 17 18 348 31 32 516 43 44 864 69 70 n c [31 FR 4687, Mar. 19, 1966; 31 FR 4949, Mar. 25, 1966, as amended at 36 FR 18457, Sept. 15, 1971. Redesignated at 41 FR 42640, Sept. 28, 1976 and 42 FR 32514, June 27, 1977, further redesignated at 45 FR 69424, Oct. 21, 1980 and 46 FR 63203, Dec. 31, 1981] § 42.141 Obtaining Operating Characteristic (OC) curve information for skip lot sampling and inspection. The Operating Characteristic (OC) curve information (probability of acceptance) for skip lot sampling and inspection procedures described in § 42.121 is easily obtained from the single curve in § 42.142. The procedure for using the curve in § 42.142 is as follows: (a) Select any sampling plan for normal condition of container inspection from Table I or Table I-A of § 42.109. (b) For a given Quality of Submitted Lots, 100 p (c) Refer to § 42.142 with this Percent of Lots Expected to be Accepted, Pa, and read the new Percent of Lots Expected to be Accepted, Pas, which results when using these skip lot procedures. For example, let's assume the lot size is 6,001 to 12,000 containers, and we use the single sampling plan of size 168 for normal inspection (Table I of § 42.109) along with an AQL for total defects of 6.5. The OC curve for this sampling plan is curve N and R3. Also, assume that the quality of the lot is 6.5 defects per hundred units. From curve N and R3, then, the Pa is determined to be 95 percent. Then refer to the graph in § 42.142 and locate Pa of 95 percent along the horizontal axis. From this point, proceed vertically to the curve and then horizontally to the left to the vertical axis. From this point on the vertical axis, Pas is determined to be approximately 98 1 1 [41 FR 42641, Sept. 28, 1976. Redesignated at 42 FR 32514, June 27, 1977 and 45 FR 69424, Oct. 21, 1980 and further redesignated at 46 FR 63203, Dec. 31, 1981] § 42.142 Curve for obtaining Operating Characteristic (OC) curve information for skip lot sampling and inspection. Notes: 1. This curve applies only to the specific skip lot sampling and inspection plan described in §§ 42.121 and 42.123. 2. Pa and Pas are essentially equal for values under 50 percent. [41 FR 42641, Sept. 28, 1976. Redesignated at 42 FR 32514, June 27, 1977 and further redesignated at 45 FR 69424, Oct. 21, 1980 and 46 FR 63203, Dec. 31, 1981] § 42.143 Operating Characteristic (OC) curves for on-line sampling and inspection. (a) This section contains the Operating Characteristic (OC) curve for each of the on-line cumulative sum sampling plans provided in subpart D. The OC curve and the corresponding cumulative sum sampling plans are listed by AQL. (b) Different plan parameters used to make acceptance and rejection decisions are provided for each AQL. (c) The curves show the ability of the various cumulative sum sampling plans to distinguish between good and bad portions of production. The interpretation of these curves for portions of production is similar to the interpretation of the OC curves for stationary lots as illustrated in § 42.140(c). Reduced, Normal and Tightened Inspection Plans—Cumulative Sum Sampling Plans and Operating Characteristic (OC) Curves for AQL = 0.25 Defects per Hundred Units [Sampling plans—AQL = 0.25] Identification name of OC curves Reduced Normal Tightened n g T L S n g T L S n g T L S 13 0 0 0 25 0.05 0.95 0.35 50 0.1 0.9 0.3 n g Reduced, Normal, and Tightened Inspection Plans—Cumulative Sum Sampling Plans and Operating Characteristic (OC) Curves for AQL = 1.5 Defects per Hundred Units [Sampling plans—AQL = 1.5] Identification name of OC curves Reduced Normal Tightened n g T L S n g T L S n g T L S 13 0.5 0.5 0 25 0.5 2 1 50 0.8 1.6 0.4 n g Reduced, Normal, and Tightened Inspection Plans—Cumulative Sampling Plans and Operating Characteristic (OC) Curves for AQL = 6.5 Defects per Hundred Units [Sampling Plans—AQL = 6.5] Identification name of OC curves Reduced Normal Tightened n g T L S n g T L S n g T L S 13 1 2 1 25 2 3 1 50 2.5 3 1 n g [45 FR 69424; Oct. 21, 1980. Redesignated at 46 FR 63203, Dec. 31, 1981]