MIL-B-49030A
4.6.1.5.1 Sampling plan. A sample of ns batteries shall be selected at random from production for each shipment
lot in amounts determined from the following formula, and rounded off in the case of fractions to an adjacent integer
(up or down for each shipment lot), so that exactly n batteries have been assigned to each capacity test (T and D)
when the sample for the final shipment of the contract lot has been drawn.
NS
(2n)
nS =
N
Where:
ns = Total number of sample batteries to be taken from each shipment lot.
Ns = Number of batteries in the shipment lot.
n = Number of batteries to be taken from the contract lot for each of the two capacity tests, T and D
in accordance with table VIII. (Total number of batteries selected is 2n.)
4.6.1.5.1.1 Smaller-than-shipment (sub-shipment lots). At the supplier's option, selection of sample batteries (see
4.6.1.5.1) may be made on a smaller-than shipment (sub-shipment) lot basis. In such cases, the sample size for the
sub-shipment lot shall bear the same ratio to the sample size for the shipment lot as the sub-shipment lot bears to the
shipment lot.
4.6.1.5.1.2 Allocation of sample batteries for group C inspection. The number of batteries ns , selected from a
shipment lot (see 4.6.1.5.1) shall be assigned at random for group C inspection, as follows:
The quantity of batteries ns in the sample of the first shipment lot shall be taken at random and assigned to
a.
the capacity tests. The first battery shall be assigned to the T test, and the second to the D test. This shall
be repeated until all the batteries have been assigned. This sequence of assignment of sample batteries to
the two capacity tests shall be resumed in each succeeding shipment lot at the same point at which it
ended in the previous shipment lot.
b.
The assignment of batteries to capacity tests shall result in the allocation of exactly n batteries to each of
the two capacity tests after the final shipment on the contract lot is made. If necessary, the sample size ns
taken from the last shipment lot of a contract shall be adjusted so that this result is achieved.
TABLE VII. Group C inspection.
Examination and
Requirement
Test method
tests
paragraph
paragraph
Capacity T
through 4.7.9.5
Capacity D
through 4.7.9.5
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