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Weight ranking by item.
| No | Evaluation item | Frequency | Weight (%) | Ranking |
|---|---|---|---|---|
| 1 | Age | 10 | 15.87% | 1 |
| 2 | Maintenance cost rate |
7 | 11.11% | 2 |
| 3 | Part discontinuation | 7 | 11.11% | 2 |
| 4 | Failure rate | 6 | 9.52% | 4 |
| 5 | Physical high risk | 4 | 6.35% | 5 |
| 6 | Model discontinuation | 3 | 4.76% | 6 |
| 7 | BMET evaluation | 3 | 4.76% | 6 |
| 8 | Equipment risk | 3 | 4.76% | 6 |
| 9 | Accident history | 2 | 3.17% | 9 |
| 10 | Device obsolescence | 2 | 3.17% | 9 |
