Universal Functional Test (UFT):
A Cost-Effective Manufacturing Test Development Software Platform.
The general principle of operation for this tester is that the operator will connect a UUT to any port test station, and it will automatically determine and start the appropriate test. Regardless of the setup procedure for the given UUT, the last step is to power up the UUT. This allows the tester to see the UUT boot into a known state, giving the tester an opportunity to identify and interact with the UUT.
The Process
The parallelism of the tester can be scaled up to so the operator is never waiting, as follows:
Operator plugs each of a UUT’s ports into tester, then connects power.
Operator scans UUT barcode into UAT to track and program unique identity. The test on the connected UUT begins. Meanwhile, the operator returns to step 1 until all ports are full or production queue is empty.
If equipped with enough test ports, the time required to load and unload all test ports will exceed the test time, allowing this tester to keep the operator busy on a continuous basis.
Operator disconnects passing UUTs and places them in the “good” bin, returning to step 1 until production queue is empty.
Failing UUTs: To keep production flowing the operator generally sets these aside in “bad” bin for later debug and continue running fresh product.
All logs are saved and cross-referenced in a database for retrieval using GSR. A barcode scan pulls up all records for a product for debug and diagnosis.
Troubleshooting and repair run at a different pace than production. To support both, UAT always displays an estimate of how soon each test slot will be ready for operator’s attention, based on duration of previous test runs. This is handy for long-running tests on debug boards as the operator can walk away and do other work until the stated time has elapsed.
Questions?
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