A-A-688B
reserves the right to require proof of such conformance prior to first delivery and thereafter as may be otherwise provided for under the provisions of the contract.
5.2 Suppliers are encouraged to use quality control (QC) techniques that exhibit control over their processes (e.g. (Statistical Process Control) SPC techniques) as defined in American National Standards Institute (ANSI) Z1.1, Z1.2 and Z1.3/ American Society for Quality Control (ASQC) B.1, B.2, and B.3 that systematically reduce excess variations. If used, objective evidence shall be available that demonstrates overall measurement adequacy techniques and controls. These techniques shall ensure quality levels equal to, or greater than, those cited in applicable technical document or, herein.
End item inspections/testing may be used by the offeror or the Government representative, as a means to determine the effectiveness of the process quality controls. While in-process controls shall not be substituted for end item performance testing.
For those characteristics for which there are no such controls, or for end item performance test, lot by lot sampling for inspection/test shall be required. Sampling shall be in accordance with (ANSI)/ (ASQC) Z1.4. An inspection lot shall consist of all bags manufactured by the same process from the same components at the same time. The sample unit shall be one bag. The inspection level shall be S-2 with an AQL of 4.0% defective for construction, dimensions and workmanship. The inspection level shall be S-1 with an AQL of 2.5% defective for physical requirements.
The supplier must provide objective evidence (test and inspection records) that the presented material meets the requirements of the sampling plan as indicated above.
5.3 Adhesive testing. The end item shall be tested for adhesion requirements. A composite sample of 13 bags shall be randomly selected from each lot. Failure of any bag shall result in rejection of the lot.
Adhesive used in the fabrication of the bags, at the bottom seam (or fold) and center seam shall be waterproof to the extent that there shall be not less than 95% fiber failure. Testing for adhesion shall be as follows: Cut the full width of a bottom seam (or bottom fold) from the bag, the entire center seam, with not less than 12.7 mm (1/2”) of paper on each side of the seam and immerse distilled water (room temperature) at a depth of not less than 25 mm (1”). After one hour, remove specimen from the bath and separate the seamed area by hand. Examine the pre-bonded surfaces and report the percentage of fiberless separation to the nearest percent. If the fiberless area is less than 5%, two additional specimen are to be tested in a like manner for confirmation.
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