Example: Test design to demonstrate reliability given a stress distribution: Difference between revisions
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Furthermore assume that we wish to achieve, as well as demonstrate, a reliability of 99.9% at a 90% confidence in our design. | Furthermore assume that we wish to achieve, as well as demonstrate, a reliability of 99.9% at a 90% confidence in our design. | ||
==Step 1== | ==Step 1: Compute the Stress Distribution== | ||
Using Weibull++ a Weibull distribution was fitted to the data: | Using Weibull++ a Weibull distribution was fitted to the data: | ||
*Distribution: Weibull-2P | *Distribution: Weibull-2P | ||
Revision as of 18:00, 21 August 2011
Assume that the following date set is random sample of usage loads for a particular component in some unit U.
- 480; 645; 720; 950; 975; 1,175
Furthermore assume that we wish to achieve, as well as demonstrate, a reliability of 99.9% at a 90% confidence in our design.
Step 1: Compute the Stress Distribution
Using Weibull++ a Weibull distribution was fitted to the data:
- Distribution: Weibull-2P
- Analysis: RRX
- Ranking: MED
- Beta: 3.2839
- Eta (U): 919.9457
- Rho: 0.9901