The latest two updates are SR-332 Issue 1 (May 2001) and SR-332 Issue 2 (September 2006), both called “Reliability Prediction Procedure for Electronic Equipment.” The Bellcore/Telcordia standard assumes a serial model for electronic parts and it addresses failure rates at the infant mortality stage and at the steady-state stage with Methods I, II and III 2-3.īellcore was a telecommunications research and development company that provided joint R&D and standards setting for AT&T and its co-owners. So the result of 0.0217 / 10 6 hours in MIL-HDBK-217 is much higher than the result in Bellcore/Telcordia SR-332. In order to compare the predicted results from MIL-HBK-217 and Bellcore SR-332, we must convert the failure rate to the same units. With its latest edition (issue 4) from 2016, Telcordia has. Telcordia SR-332 was the second electronic reliability prediction standard (after Mil-HDBK-217) and is still the second most popular of all current electronic reliability prediction standards. MIL-HDBK-217 does not specify UCL for its calculations. Telcordia SR-332 Issue 4 allows you to specify an Upper Confidence Level (UCL) for the calculations.
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