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: Uma
Date posted: Tue Aug 20 14:37:17 US/Eastern 2002
Subject: Year of manufacture (used to calculate piG) in PRISM
Is the year of manufacture (used in calculation of growth rate pi factor piG)the year a part was first manufactured? Or is it the year you bought it?
For eg. if I buy a transistor today, is the year of manufacture 2002, or is it the first year this type of transistor was first manufactured?
Subject: PRISM Year of Manufacture
Reply Posted by: David Dylis
Organization: Reliability Analysis Center (RAC)
Date Posted: Tue Aug 20 15:45:51 US/Eastern 2002
The year of manufacture is used in the PRISM as a factor in reliability growth calculations. This growth is presented as a function of part type and the year in which the item was manufactured (PRISM reliability predictions can be performed through calendar year 2005. The base year upon which all of the RACRates models are normalized is 1993). When performing your PRISM reliability assessment, the year that the component was manufactured (e.g., date code found on device) should be used.