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: Uma
Date posted: Wed Aug 21 9:23:43 US/Eastern 2002
Subject: Year of manufacture
The year of manufacture (used in piG calculation)is supposed to be the year the part was manufactured. Everything is normalised to 1993. But what about a part that was first manufactured in say 2001? If I buy it in 2002, it is only a year old. Shouldn't the piG for this part be much higher? If I use 2002 as the year of manufacture, PRISM gives me a much lower piG value (since it uses the 1993 normalised data). I would have assumed "delta t", the time since it was first manufactured (maturity level) would be used to calculate the growth rate.