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