MILPRF50884F
APPENDIX C
C.6 SUITABILITY OF INSPECTION FACILITIES
C.6.1 Suitability of inspection facilities. The inspection facility used to perform qualification testing and periodic
conformance inspection shall be found suitable by the qualifying activity to the requirements of ISO 17025,
IPCQL653, or equivalent for the performance of the tests and inspection of compliant printed wiring boards.
Additional details regarding the suitability status of an inspection facility are outlined in the DLA Land and Maritime
publication "DSCCVQ Laboratory Suitability Information" that can be downloaded or viewed at the following URL:
C.6.2 Suitability status and test reports. Granting of laboratory suitability to an inspection facility does not mean
that the Government will automatically accept or approve a test report prepared by the laboratory. Some of the most
common reasons for rejection of qualification and periodic conformance test reports are the following:
a.
Testing prior to receipt of an authorization to test.
b.
Failure to record actual test conditions or results.
c.
Failure to perform the proper test.
d.
Failure to perform the test on the proper qualification test specimen.
e.
Failure to test the minimum number of samples specified.
f.
Incorrect test procedures.
g.
Use of improperly calibrated test equipment.
h.
Use of test equipment not previously found acceptable by DLA Land and Maritime.
C.6.3 Referee testing. Concerns with sample condition or sample identification shall be made to the qualifying
activity prior to commencement of the referee testing. Comments on deviations from the applicable test method shall
be made immediately at the time of testing. Unresolved concerns shall be specific in nature and submitted in writing
to the laboratory s designated qualifying activity representative and the other observer at the time of testing.
C.7 DEFINITIONS FOR TEST EQUIPMENT AND INSPECTION FACILITIES
C.7.1 Accuracy. A measure of the closeness of an individual measurement or the average of a number of
measurements to the true value. Accuracy includes a combination of random error (precision) and systematic error
(bias) components that are due to sampling and analytical operations.
C.7.2 Bias. The systematic or persistent distortion of a measurement process, which causes errors in one
direction (i.e., the expected sample measurement is different from the sample's true value).
C.7.3 Calibration. Calibration is an activity related to measurement and test equipment. Calibration is the
comparison of measurement standard, instrument, or item of known precision and bias with another standard,
instrument, or item to detect, correlate, report, or eliminate by adjustment, any variation in the precision and bias of
the item being compared. Use of calibrated measurement standard, instrument, or items provide the basis for value
traceability of product technical specifications to national standard values.
C.7.4 Limit or specification limit. A specification limit are numerical requirements specified in appendix A, in the
applicable master drawing, or in referenced documents, for the minimum or maximum value used for acceptance
purposes.
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