SRC Forum - Message Replies
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
Posted by: Shanta
Date posted: Fri Mar 12 9:20:47 US/Eastern 2004
Subject: Growth pi factor (piG) in PRISM
In PRISM, Appendix F gives the RACRates Growth Rate Pi-Factor as a function of part type and year of manufacture. It states that "PRISM reliability predictions can be performed as far as calendar year 2005". What happens in 2006? How will piG be calculated then? Is there any factor that I can use right now to predict piG for 2006 and beyond?
Thank you for your help in advance.
Subject: PRISM Growth Model
Reply Posted by: BWD
Date Posted: Thu Mar 25 14:04:38 US/Eastern 2004
The growth rate factor used in the PRISM reliability models defaults after 2005, which means that follow-on years will have the same failure rate. This default will be changed when a new up-date to the program is initiated. At this time, we do not have a factor to estimate the 2006 and beyond values.