Example: Test design to demonstrate reliability given a stress distribution: Difference between revisions
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(Created page with 'Assume that the following date set is random sample of usage loads for a particular componentin some unit U. *480 *645 *720 *950 *975 *1,175') |
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Assume that the following date set is random sample of usage loads for a particular | Assume that the following date set is random sample of usage loads for a particular component in some unit U. | ||
*480 | *480 | ||
*645 | *645 | ||
| Line 6: | Line 6: | ||
*975 | *975 | ||
*1,175 | *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 | |||
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 | |||
Revision as of 17:58, 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 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