2008 ARS, India
Track 1 Session 3

Concepts in Modeling System Reliability

A system engineer is often interested in a single number to represent the trustworthiness of the system — normally in the form of an estimate of the overall reliability of the system. This should reflect the performance compliance over the range of operating conditions and time. It is generated using subsystem data, which in turn depends on component/part data.

Such a model, when integrated sufficiently early in a project phase, offers several advantages. First, it allows visualization of system behaviors under different conditions. Second, it allows the analyst to define/redefine the individual subsystem reliability goals. Third, it drives the strategies to alter the goals. Finally, it helps the analyst to decide on the appropriate use of redundancy — where and how much.

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