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: Gary
Date posted: Tue Sep 10 16:27:57 US/Eastern 2002
Subject: Conversion from kilometers to hours
Is there a standard method for converting failures per million miles to failures per million hours in order to integrate a known value (i.e MMBF = 1500 miles) into a system level prediction (MTBF)?
Subject: Conversion Factor
Reply Posted by: BWD
Date Posted: Wed Sep 11 13:50:13 US/Eastern 2002
The conversion factors that RAC uses in the analysis of data for NPRD-95(Non-electronic part reliability database)is 28.8 miles per hour for wheel vehicles and 10.0 for track vehicles. These factors are used to convert the total miles to hours, then statictical analysis is used to determine the failure rate at some confidence level.