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Forum: Reliability & Maintainability Questions and Answers

Topic: Reliability & Maintainability Questions and Answers

Topic Posted by: Reliability & Maintainability Forum ( )
Organization: System Reliability Center
Date Posted: Mon Aug 31 12:47:36 US/Eastern 1998

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Posted by: Leroy Meyers ( )
Date posted: Tue Nov 21 14:53:05 US/Eastern 2000
Subject: PRISM
Now that PRISM as been available for a while, how well has it been accepted in industry internationally as a replacement for 217?


Subject: PRISM Program
Reply Posted by: Dave Dylis ( )
Organization: Reliability Analysis Center
Date Posted: Mon Nov 27 9:16:24 US/Eastern 2000
PRISM, released in March of 2000 has gained wide acceptance in the R&M user community and is viewed as the replacement for MIL-HDBK-217 and 217-type modeling methodologies. It is often difficult to instill change away from methodologies that have been utilized for decades, however the inadequacies that exist within these predecessor methodologies have helped the community embrace PRISM with much enthusiasm. As you are probably aware PRISM deviates from traditional reliability prediction methodologies by allowing a user to factor in test data and address system level design and manufacturing processes to refine a system prediction. These factors known to impact field reliability have been previously ignored. In addition, the newly developed PRISM component and system assessment models address not only operational aspects but also non-operational and/or dormant aspects of a part or system. These models based on RACís most current reliability data will be updated routinely as new data is collected whereby keeping the models and the PRISM approach current with the state-of-the-art. The best testimonial to PRISM acceptance is systems that are currently being analyzed using PRISM. We are aware that the following types of systems are being assessed: satellite systems, radars, computers, transmitter/receivers, cryogenic cooler electronics, fuel cell electronics and down-hole oil drilling electronics to name a few. PRISM has also been specified as the recommended prediction methodology to be used in at least one new system procurement.

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