"Time of Demonstration" requirement for Reliability Test

tahirawan11

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#1
Hi,

I need to define a reliability demonstration test plan that will ensure an MTBF of 500 hours for a product with 99% reliability and 90% confidence with zero failures. I have calculated the 'Time of demonstration' as 2291.05 hours for a sample of 50 units (see attachment). Does it mean that each product need be tested for 46 hours (2291.05 / 50) in order to meet the requirement or all the all products needs to be tested for 2291.05 hours in order to meet the reliability requirement?

thanks
 

Attachments

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