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Forum: Reliability & Maintainability Questions and Answers

Topic: Reliability & Maintainability Questions and Answers

Topic Posted by: Reliability & Maintainability Forum (src_forum@alionscience.com )
Organization: System Reliability Center
Date Posted: Mon Aug 31 12:47:36 US/Eastern 1998

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Original Message:

Posted by: Mehta (vardhman_mehta@hotmail.com )
Organization:TELCO
Date posted: Sat Feb 22 3:23:28 US/Eastern 2003
Subject: Reliability measurement for Automobile
Message:
I was hoping someone could help me out. 1. What is the best indice for specifying reliability of a car? Should we take into consideration of Power train,chassis, Electrical items(horn,headlamps,blinkers, etc...), etc all of the components of the system or only some of the subsystems as mentioned above? 2. How can i predict reliability of new development car? Could you please provide an example?


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Reply:

William H. Crowell Subject: Repair Incidents
Reply Posted by: (wcrowell@alionscience.com )
Organization: Reliability Analysis Center
Date Posted: Wed Feb 26 16:06:28 US/Eastern 2003
Message:
As a rule of thumb a Rough Measurement of Repair Incidents per 100 vehicles per year or 10,000 miles would be:
Less than 50 Repairs is Very Good
50 to 100 Repairs is Good
100 to 150 Repairs is Fair
Greater than 150 Repairs are Poor

All components are included under most first year warranties.
To perform a Reliability Modeling Analysis you should use the following:
Use Historical Data
Use Stress Test data
Use Sample Long Term Test Data
Use Mechanical Parts Data NPRD-95
Use Electrical Parts Data EPRD-97


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