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

Table 6

2nd TOPSIS evaluation result for priority 1∼2 alternatives.

Main category		Economics		Environmental				Safety		Weighted sum	Total value	Preference ranking
Characteristic details		Low cost	Additional safety low cost	Low noise	Low dust	Waste reduction	CO2 reduction	Safety	Risk reduction
Weight		9	9	7	6	10	8	10	10
A001	Normalized score	5	5	3	4	3	5	3	4	275	7.97	1
	Weighted	45	45	21	24	30	40	30	40
A004	Normalized score	3	4	5	5	4	4	3	3	260	7.54	2
	Weighted	27	36	35	30	40	32	30	30

: 10-point scale weights (importance, total value)