#1




Failure Rate specification
I'm confused by something which I ought to know.
I have a failure rate of 0.01%/1000hours. How would one begin to put this into a prediction? Is it just mission time multiplication? Sorry, prediction isn't my thing. 
#2




Re: Failure Rate specification
You mean that failure rate is constant in this case?

#3




Re: Failure Rate specification
Hi,
Since you already have the failure rate, and if you are attempting to put it into the Lambda Predict 3 software, you can use the External component. This will allow you to enter the Base Failure Rate. For MIL/ NSWC standards, the failure rate equals 0.1 FPMH For Bellcore/Telcordia standards, the failure rate equals 100 FIT I hope that this helps. Kathleen Laird 
#4




Re: Failure Rate specification
I'm coming back to this one! I just cannot get my head around this at all.
Say, I'm wanting to specify this as FIT or 10^6. How would I go about it? 
#5




Re: Failure Rate specification
Sometimes we can get confused with notation and you may be overthinking this problem:
You have a failure rate of 0.01%/1000hours. In this case the percentage represents a fraction of a failure rather than a probability. 100% represents one whole failure. (I don’t personally like expressing failure rates in this way, because it is confusing.) So: 0.01%/1000 hours = 100% /10 000 000 hours = 1 failure per 10 000 000 hours = 0.1 failure per 1 000 000 hours = 100 FIT Does that help? or have I not understood the question?
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Richard C Reliability Engineer (Large Systems) Based in the UK Last edited by Richard_UK; February 14th, 2017 at 08:44 AM. Reason: too many gaps 
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