Forum Questions and Answers
Topic: PRISM Questions and Answers
Topic Posted by: SRC (src_forum@alionscience.com )
Organization: SRC
Date Posted: Wed Jan 12 8:33:33 US/Eastern 2000
Topic Description: Welcome to the PRISM forum! Please feel free to post your questions and comments about the PRISM assessment software here.

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Original Message:
Posted by: Dave Ellis (ellis@ezlink.com )
Organization:Ellis Quality Engineering Services
Date posted: Tue Oct 10 11:50:29 US/Eastern 2000
Subject: System/Assembly level failure rate roll ups
Message:
I am in the process of generating a medium sized prediction and have noticed that the system or assembly level failure rate summarizations don't agree with manually calculating the total failure rates. For example, one assembly has 2.379, another 0.094 and another 0.065, but the overall system failure rate is only at 0.589 and the system level hardware component is less than the total sum. Comments? Thanks.
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