Research Article
Multicriteria FMECA Based Decision-Making for Aluminium Wire Process Rolling Mill through COPRAS-G
Table 8
Criticality ranking based on MCI.
| Failure cause versus criteria | Weighted mean normalized sum | Relative weight | % contribution | Criticality rank | Failure cause | Notation | | MCI | | Rank |
| Bearing high temperature | C1 | 0.1297 | 0.1297 | 60 | 9 | Bearing corrosion | C2 | 0.1244 | 0.1244 | 58 | 10 | Bearing fatigue | C3 | 0.2156 | 0.2156 | 100 | 1 | Roller balls wear-out | C4 | 0.1662 | 0.1662 | 77 | 4 | Bearing misalignment & improper mounting | C5 | 0.2079 | 0.2079 | 96 | 2 | Electrical damage | C6 | 0.1062 | 0.1062 | 49 | 12 |
| Gear teeth wear-out | C7 | 0.1401 | 0.1401 | 65 | 8 | Gear teeth surface fatigue (pitting) | C8 | 0.1444 | 0.1444 | 67 | 7 | Gear teeth scoring | C9 | 0.0863 | 0.0863 | 40 | 14 | Gear teeth fracture | C10 | 0.1700 | 0.1700 | 79 | 3 | Gear teeth surface cold/plastic flow | C11 | 0.1022 | 0.1022 | 47 | 13 |
| Shaft fretting | C12 | 0.1096 | 0.1096 | 51 | 11 | Shaft misalignment | C13 | 0.1477 | 0.1477 | 68 | 6 | Shaft fracture (fatigue) | C14 | 0.1526 | 0.1526 | 71 | 5 |
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