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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: chandu (chandra_hari@rediffmail.com )
Organization:Nagarjuna univeristy
Date posted: Tue Mar 4 6:33:32 US/Eastern 2003
Subject: PREDICITON OF PARAMETER
Message:
I have some laboratory data (accelerated test)for Grade 1 item and Grade 2 item, i have estimated parameters of weibull distribution. For the Grade 1 item i have field data and i have estimated the parameters of weibull distribution. Here i have a problem in correlating the field data with laboratory data for grade 1 item. How can i correlate this Grade 1 data? By using this same same logic How can one predict the field data parameters for Grade 2 ? Please help me in this case....


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Subject: Correlating field life and lab data life
Reply Posted by: Hari (chandra_hari@rediffmail.com )
Date Posted: Tue Apr 1 6:28:40 US/Eastern 2003
Message:
Thank you very much for responding to my query. I will give my data for grade 1: lab data: on 7 samples: 80 42 43 72 49 44 87 And field failure data are as follows: Mileage Total Producion number:1395 16346.3 28435.0 10428.1 3009.4 15973.1 14001.9 10241.3 11098.8 11098.8 8839.4 16953.1 20065.6 20017.5 For grade 2: lab data is on two samples: 538 537 I will be very grateful to you, if you provide the answer.


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