Before a component (or module, board etc) can be released, it needs to undergo testing. Some tests can be required by regulations or customers, some are done to verify the performance or yield level. And more. Some tests are "characterization" and some are simulating aging and other aspects that can be expected over desired life time.
As example: for optical components is Telcordia standards (formerly Bellcore) more or less the de facto standard to use in telecommunication. The most known is GR-468-CORE, for optoelectronic devices such as optical transceivers.
The standard gives a list of tests to be done in the qualification work. This is a kind of minimum tests to be considered. But other tests may be needed: the technology may be different and need other tests, the use case/condition can be different etc. It must always be a reviewed if the standard tests are relevant case by case.
Testing consumes time and money. Therefore all tests, the minimum list as well as additional tests, may not be needed to be done on the specific component. Because it has already been tested on a component built on same platform, with same technology etcetera.
A test can be omitted and seen as approved based on similarity. The expert, the person who takes this decision, must in the test report give the arguments why similarity apply.
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1 October 2017
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