Introduction to Lambda Predict

When actual product life data is not available, standards based reliability prediction may be used to evaluate design feasibility, compare design alternatives, trade-off system design factors and track reliability improvement.

ReliaSoft Lambda Predict by HBM Prenscia supports failure rate and MTBF predictions based on the major reliability prediction standards, including MIL-HDBK-217, Bellcore/Telcordia, FIDES, NSWC Mechanical and Siemens SN 29500.* The software offers a full set of supporting tools, including easy-to-use component library functionality, a reliability allocation utility and derating analysis.

Lambda Predict is also part of the suite of ReliaSoft desktop applications, which offers intelligent integration between reliability program activities and tools, while simultaneously facilitating effective information sharing and cooperation between engineering teams of any size. For information about features that are shared by all (or most) of the ReliaSoft desktop applications, see the Databases and Projects, Desktop Application Interfaces and ReliaSoft Common Tools chapters.

Other ReliaSoft software by HBM Prenscia includes: Weibull++, BlockSim, XFMEA, RCM++, MPC, SEP web portal and XFRACAS.

What's Changed? The ReliaSoft RBI application has been discontinued as of Version 2021. For information on RBI functionality, please refer to the product help specific to your version of the software, available from

* Disclaimer: The Lambda Predict software is intended to facilitate the widely used methods that are described in published reliability prediction standards. The software was not developed in cooperation with or endorsed by the organizations that developed and published these standards. The software has been validated against the standards themselves but any issues with the methods described within a standard should be directed to the publishing organization so the feedback may be considered in a future update to the guideline.