The Telcordia document, Reliability Prediction Procedure for Electronic Equipment, describes several different calculation methods for adjusting base failure rates. The Prediction module supports using these methods with not only Telcordia and prior Bellcore models but also with other models.

Bellcore Issues 4, 5, and 6 refer to these calculation methods as Method I, Method II, and Method III. Telcordia Issues 1 and 2 refer to them as Black Box Technique, Black Box Technique Integrated with Laboratory Data, and Black Box Technique Integrated with Field Data. Issue 3 returns to calling them Method I, Method II, and Method III. However, Issue 3 also describes them as black box or parts count methods that can be integrated with laboratory or field data.

Minor calculation modifications were made between Bellcore Issue 6 and Telcordia Issue 1 Subsequent changes were made only to method names to clarify usage. For the sake of consistency, the Prediction module uses Method I, Method II, and Method III. Their usage is then described in the explanatory topics for the methods.

The following topics provide information about Telcordia calculation methods:

Additional information about entering the burn-in, laboratory, and/or field data required by these methods appears in the following topics: