MILPRF50884F
APPENDIX C
C.4.2 Acceptance and procedure.
C.4.2.1 Acceptance number (C = 0). Acceptance of inspection lots shall be based on an acceptance number of
zero (C = 0).
C.4.2.2 Rejection number (R ≥ 1). Failure of a sample unit for one or more tests of a subgroup shall be charged as
a single failure. One or more sample rejects shall be cause for failure of the lot or sublot, as applicable. Any failure
on any of the sample units shall constitute a failure of the entire inspection lot or sublot.
C.4.3 Tightened inspection (for reevaluation purposes). Tightened inspection shall be performed by sampling
using double the sample size as specified in table CI with zero failures allowed or 100 percent.
C.4.4 Sample size. The sample size for each subgroup shall be determined from table CI. If lot size is smaller
than sample size, test all of the units. The manufacturer may, at their option, select a sample size greater than that
required; however, the number of failures permitted shall not exceed the acceptance number.
C.4.5 C = 0 sample plan construction (selection and usage of the sample size series). The sample size series of
table CI to be used will be directed from the appropriate inspection table. The inspection table will specify the C = 0
sample plan (test specimen identifier and sample size series) or plans (test printed wiring board, test coupons, or
either one) to use.
EXAMPLES: If an inspection table specified that "Plan BF or TL" be used when verifying test specimens, it is
specifying that sample size series "F" of table CI shall be used for selecting printed wiring boards and sample size
series "L" shall be used for selecting test coupons. If the same inspection table specified that "Plan *H" be used (the
asterisk "*" representing both printed wiring boards and test coupons), then sample size series "H" of table CI shall
be used for either printed wiring boards or test coupons.
TABLE CI. C = 0 (zero defect) sampling.
Sample size (number of test specimens to be inspected) 1/
Lot size
Series A
Series D
Series F
Series H
Series J
Series L
Series N
1 to 8
All
All
All
5
3
2
1
9 to 15
All
All
13
5
3
2
1
16 to 25
All
All
13
5
3
2
1
26 to 50
All
32
13
5
5
3
2
51 to 90
50
32
13
7
6
4
2
91 to 150
50
32
13
11
7
5
2
151 to 280
50
32
20
13
10
6
4
281 to 500
50
48
29
16
11
7
4
501 to 1,200
75
73
34
19
15
8
4
1,201 to 3,200
116
73
42
23
18
9
4
1/
If lot size is smaller than sample size test all of the units.
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