 |
New format available! This reference is now available in a new format that offers faster page load, improved display for calculations and images and more targeted search.
As of January 2024, this Reliawiki page will not continue to be updated. Please update all links and bookmarks to the latest references at Weibull examples and Weibull reference examples.
|
Test-Fix-Test Data (Failure Terminated) Reference Example |
This example compares the results for test-fix-test (failure terminated) data.
Reference Case
International Standard IEC 61164 (Reliability Growth in Product Design and Test – Statistical Test and Estimation Methods), Example 1 – Case 2, pg. 30.
Data
| Termination Time = 975 hours |
|---|
| 2 |
| 4 |
| 10 |
| 15 |
| 18 |
| 19 |
| 20 |
| 25 |
| 39 |
| 41 |
| 43 |
| 45 |
| 47 |
| 66 |
| 88 |
| 97 |
| 104 |
| 105 |
| 120 |
| 196 |
| 217 |
| 219 |
| 257 |
| 260 |
| 281 |
| 283 |
| 289 |
| 307 |
| 329 |
| 357 |
| 372 |
| 374 |
| 393 |
| 403 |
| 466 |
| 521 |
| 556 |
| 571 |
| 621 |
| 628 |
| 642 |
| 684 |
| 732 |
| 735 |
| 754 |
| 792 |
| 803 |
| 805 |
| 832 |
| 836 |
| 873 |
| 975 |
Result
Beta (UnB) = 0.5594, Lambda = 1.1067
CL = 0.9 (two-sided confidence bounds on DMTBF
DMTBFUpper = 46.7 hours
DMTBF = 33.5 hours
DMTBFLower = 24.3 hours
CVM = 0.041, critical value = 0.173. Since CVM < critical value can fail to reject hypothesis that the model fits the data.
Results in Weibull++
Sample content