From: A visual tool for accessibility study of pipeline maintenance during design
Medium
Mean (points)
Std. Deviation (points)
p-value
2D plan drawing
36.0
13.5
2D & 3D
0.000*
3D model
53.8
17.0
2D & VAO
0.004*
VAO Checker
48.0
17.3
3D & VAO
0.020*