Systematic Approach of TOPSIS Decision-Making for Construction Method Based on Risk Reduction Feedback of Extended QFD-FMEA

Table 5

Technical characteristics for priority 1∼2 alternatives on 2nd TOPSIS evaluation.

Main category	Characteristic name	Importance	A001	A004
Economics	Low cost	9	5	3
	Additional low safety cost	9	5	4
Environmental	Low noise	7	3	5
	Low dust	6	4	5
	Waste reduction	10	3	4
	CO2 reduction	8	5	4
Safety	Safety	10	3	3
	Risk reduction (total)	10	4	3

Low cost (additional low safety cost): A001 (0%∼10%: 5 Grade, 5.9%), A004 (10%∼20%: 4 Grade, 16.4%) total risk reduction rate (TRRR): A001 (50∼70%: 4 Grade, 58.1%), A004 (30%∼50%: 3 Grade, 38.76%) The decision maker determines the rating scale.