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.' Telcordia continues to revise and update the standard. In 1997, the company was acquired by Science Applications International Corporation (SAIC) and the company's name was changed to Telcordia.

Because of dissatisfaction with military handbook methods for their commercial products, Bellcore designed its own reliability prediction standard for commercial telecommunication products. Bellcoreīellcore was a telecommunications research and development company that provided joint R&D and standards setting for AT&T and its co-owners. Issue 3 of SR-332 contains a new level to the environmental factor to account for a frequently used deployment technique and clarity for various component names.Reliability MTBF calculation. Issue 3 of SR-332 contains clarified definitions regarding operating temperatures. Issue 3 of SR-332 contains new temperature curves for miscellaneous devices. Issue 3 of SR-332 contains updated formulas and FIT rates for integrated circuits. Issue 3 of SR-332 contains an extended range of complexity for devices. Issue 3 of SR-332 contains revised generic device failure rates in Section 8, based mainly on new data for many components. Issue 3 of SR-332 contains new data for fiber optic transceivers, hard drives, and ferrite beads. Issue 3 of SR-332 contains tables needed to facilitate the calculation of reliability predictions. This procedure also documents a recommended method for predicting serial system hardware reliability.

These techniques estimate the mean failure rate in FITs for electronic equipment. Issue 3 of SR-332 contains recommended methods for predicting device and unit hardware reliability. This lends the procedure and the predictions derived from it a high level of credibility free from the bias of any individual supplier or service provider. Issue 3 of SR-332 provides the only hardware reliability prediction procedure developed from the input and participation of a cross-section of major industrial companies.

The Telcordia Reliability Prediction Procedure has a long and distinguished history of use within and outside the telecommunications industry. Issue 3 of SR-332 provides all the tools needed for predicting device and unit hardware reliability. This prediction provides necessary input to system-level reliability modes for predicting expected downtime per year and system availability. Reliability prediction is an important element in the process of selecting equipment. Issue 3 of SR-332, Reliability Prediction Procedure for Electronic Equipment, replaces Issue 2, and is a module of FD-ARPP-01 and FR-RELIABILITY-QUALITY-01.

Telcordia sr 332 issue 4