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

Table 4

O assessment criteria.

Possibility of failure	Evaluation criteria: the possibility of causes	Grade
Very high	New technology and new design without corresponding history	DH
High	Inevitable failure due to new design, new application, or change of operating conditions	EH
	New design, new application, or change of operating conditions may lead to failure	VH
	Uncertain failures due to new design, new application, or change of operating conditions	H
Medium	Failure of similar design and design test	MH
	Occasional failures in design and testing	M
	Isolated failures in similar designs and design tests	ML
Low	Almost identical designs and isolated failures in design testing	L
	Almost the same design and undetected failure in design testing	VL
Very low	By preventing controllable failures	EL