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: Dick Creamer (creamerra@navair.navy.mil )
Organization:NAVAIR Depot Jacksonville, FL
Date posted: Mon Feb 11 15:29:10 US/Eastern 2002
Subject: Availability
Message:
I'm trying to calculate the Ao for a fielded avionics system which may not be turned on for every mission. There is no elapsed time meter on the system. I understand total uptime would include operating time plus standby time. The conflict I'm involved in is what constitutes standby time? Is it the total flight hours in which the system is not turned on? Or, is it the rest of the year that the system is not operating? Or, does the concept of standby time even apply? It stands to reason that the system is not going to be available if you don't turn it on. Help!

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