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Warranty Data Analysis Example |
This example compares the warranty data analysis results.
Reference Case
The data set is from Example 11.2 on page 453 in the book Life Cycle Reliability Engineering by Dr. Guangbin Yang, John Wiley & Sons, 2007.
Data
A Nevada chart for the warranty data is provided in Table 11.3. The last two rows were combined, as specified in the example.
| TTF | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| TIS | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | Total | Sales Volume |
| 12 | 3 | 0 | 3 | 3 | 4 | 2 | 1 | 5 | 4 | 2 | 3 | 3 | 45 | 2123 |
| 11 | 0 | 1 | 2 | 0 | 4 | 2 | 1 | 2 | 0 | 4 | 3 | 30 | 1853 | |
| 10 | 1 | 3 | 2 | 2 | 3 | 4 | 3 | 5 | 4 | 8 | 45 | 2238 | ||
| 9 | 1 | 2 | 0 | 3 | 4 | 2 | 2 | 3 | 6 | 32 | 3052 | |||
| 8 | 2 | 3 | 2 | 6 | 2 | 1 | 6 | 4 | 34 | 2953 | ||||
| 7 | 1 | 1 | 3 | 2 | 1 | 4 | 8 | 27 | 2788 | |||||
| 6 | 1 | 0 | 1 | 0 | 1 | 2 | 11 | 2037 | ||||||
| 5 | 0 | 0 | 1 | 1 | 0 | 7 | 1863 | |||||||
| 4 | 0 | 0 | 1 | 1 | 6 | 1231 | ||||||||
| 3 | 0 | 1 | 1 | 5 | 823 | |||||||||
| 2 | 0 | 1 | 3 | 638 | ||||||||||
| 1 | 0 | 1 | 568 | |||||||||||
| Total | 9 | 12 | 16 | 18 | 19 | 17 | 21 | 19 | 14 | 14 | 6 | 3 | ||
Result
Results in Weibull++