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Author Topic:   MTTR
Michael Busha
posted 13 April 2001 07:39 AM           Edit/Delete Message   Reply w/Quote
I put this in the Statistics forum first but maybe it's better put here. Does anyone know a quick and dirty way to calculate MTTR? We have two kinds of solenoid valves, one is ISO rated, the other is not. I want to prove that the MTTR of the ISO rated valve is not significantly different from that of the non ISO rated valve. We have the capability of actually disassembling and reassembling both valves to get an accurate measure. Is there a formula I can plug the values into? Thanks for any help. The results of this analysis could save my company $40,000.

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Dan De Yarman
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Posts: 67
From:Milwaukee, WI, U.S.A.
Registered: Aug 1999

posted 17 April 2001 10:19 AM     Click Here to See the Profile for Dan De Yarman   Click Here to Email Dan De Yarman     Edit/Delete Message   Reply w/Quote
Have you contacted the manufacturer(s) to see what they recommend? If you are a QS-9000 TE Supplement registered company you should be requiring your suppliers to follow Section I of the TE Supplement requirements manual. That includes MTTR, MTBF, and whatever else you specify on your purchase order.

Keep in mind that MTTR and MTBF assume that the peson(s) reairing the item (the valve in your case) has both the knowledge and the tools to perfom the repair unless your Customer tells you otherwise. In terms of a "nice and easy" formula, I don't know of one. Sorry I couldn't be of anymore help.

Anyone else know of a way?


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