Forum: Reliability & Maintainability Questions and Answers
Topic: Reliability & Maintainability Questions and AnswersTopic Posted by: Reliability & Maintainability Forum (firstname.lastname@example.org )
Organization: System Reliability Center
Date Posted: Mon Aug 31 12:47:36 US/Eastern 1998
Original Message:Posted by: Ray (email@example.com )
Date posted: Fri Aug 13 17:29:06 US/Eastern 1999
Subject: Spurious Trip Rate
I am using Fault-Tree based reliability analysis programs to calculate the Probability of Failure on Demand (PFD) of a process model. I am interested in calculating the spurious trip rate (STR), that is safe trips or false trips. None of the programs I have are able to perform STR. Anyone who knows how to model the voting of redundant devices (especially 2-out-of-2 and 2-out-of-3) to calculate the STR? Any available resources on the internet? Your input is appreciated.