Table 9: Rank the level of impact of factor groups.

No. Effective factor Impact Index Rank
1 Factors relevant to the construction worker 0.284 1
2 Factors relevant to operation and management on construction site 0.219 2
3 Factors relevant to labor condition 0.209 3
4 Factors relevant to motivation 0.203 4
5 Factors relevant to tools and subject of labor 0.185 5
6 Factors relevant to working time 0.183 6
7 Factors relevant to natural environment 0.181 7
8 Factors relevant to labor safety 0.178 8
9 Factors relevant to project information Not considered
10 Factors relevant to socio-economic