[Retracted] Safety Investment Decision Problem without Probability Distribution: A Robust Optimization Approach

Table 2

Classification of safety investment decision-making and effects.

Case	Investment		Accident		Effects		Investment result
	Yes	No	Yes	No	Loss	Opportunity cost
1		√		√
2		√	√		√
3	√			√		√	Sufficient
4	√			√		√	Overinvestment
5	√		√		√		Underinvestment