Forum Questions and Answers
Topic: PRISM Questions and Answers
Topic Posted by: SRC ( )
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: don miller ( )
Organization:retired boeing
Date posted: Sat Dec 8 18:38:35 US/Eastern 2001
Subject: random geneic hardware failure rate
30 +years at Boeing. first 10 big hero in OR. logistic analysis , Otimum spares provisioning. I did it all. I had 3 years at TRW 1969 -1972. had the chance to review the basic notion of random failures. Back to Boeing. worked MM AWACS B1 guess what never found a ransom failure which met the criteria for inclusion into MTBF prediction effort. Finally (like Einsten who took 7 years to get rid of wrong ideas)I wised up. Have sound data which shows that any notion of predicting frequency of hardware failures is absurd. Wearout is ok. Failures occur (big time in early MM). However they are virtually always related to design problems, human error, manufacturing problems ect. Please help us rid the aerospace industry of this triva. Or any other foolish folks .I have seen a few MTBF statements on PC. Not many.
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