A Potential Failure Mode and Effect Analysis Method of Electromagnet Based on Intuitionistic Fuzzy Number in Manufacturing Systems

Table 5

D assessment criteria.

Opportunity discovery	Evaluation criteria: possibility of discovery through design control	Grade
Very very low	There is no current design control that cannot be found or analyzed	EL
Very low	Design analysis has weak discovery ability	VL
Low	Verification of a product that has passed testing (subsystem or system testing, e.g., noise and shipping) prior to release	L
Medium low	Verification of products using fault testing before product release (testing of subsystem or system failure)	ML
Medium	Verification of products using failure testing before product release (durability testing subsystem or system, such as function check)	M
Medium high	Product validation by testing before design freezing	MH
High	Product confirmation by fault test before design freezing	H
Very high	Use old test to confirm products before design freezing	VH
Very very high	Design data analysis has strong ability of discovery	EH
Extremely high	FMs cannot occur because of a fully preventive design	DH