Common factor number

Influence factor variable

Public factor naming

Y 1

X 19 , X 9 , X 20 , X 15 , X 10 , X 8 , X 14 , X 11

Participant skill level

Y 2

X 16 , X 13 , X 2 , X 17 , X 6

Construction management

Y 3

X 4 , X 12 , X 20

Level of participation

Y 4

X 7 , X 18 , X 3

Pre-construction design plan

Y 5

X 1

Project organization structure design

Y 6

X 15

Progress payment