Table 2: Relative importance index and ranking of delay factors
|
|
Owners |
|
Consultants |
|
Contractors |
|
Overall |
| Category |
Factor |
Index |
Rank |
Index |
Rank |
Index |
Rank |
Rank |
| Client |
Payments of completed work |
3.57 |
3 |
3.29 |
3 |
3.64 |
1 |
1 |
|
Owner interference |
2.67 |
28 |
2.25 |
32.5 |
2.50 |
27.5 |
30 |
|
Slowness of decision making process |
3.21 |
11 |
2.67 |
21.5 |
3.05 |
8.5 |
15 |
|
Unrealistic contract duration |
2.79 |
26.5 |
2.48 |
28 |
2.64 |
24 |
24 |
|
Excessive bureaucracy in project owner operation |
2.07 |
37.5 |
2.17 |
35.5 |
2.50 |
27.5 |
33 |
|
Tendering procedure |
2.54 |
29 |
2.75 |
20 |
3.09 |
6.5 |
19.5 |
|
Changes in scope of works |
2.50 |
30.5 |
2.38 |
31 |
2.00 |
39 |
34 |
| Contractor |
Subcontractors |
1.85 |
41 |
1.77 |
42 |
1.82 |
42 |
42 |
|
Inadequate contractor experience |
3.36 |
6.5 |
3.38 |
2 |
2.95 |
10.5 |
5 |
|
Site management |
3.79 |
1 |
3.54 |
1 |
3.05 |
8.5 |
2 |
|
Construction methods |
3.36 |
6.5 |
2.92 |
13 |
2.91 |
14 |
10.5 |
|
Improper planning |
3.29 |
9 |
3.13 |
7 |
3.14 |
5 |
8 |
|
Mistakes during construction |
2.07 |
37.5 |
2.25 |
32.5 |
1.95 |
40.5 |
39 |
|
Contractor’s financial difficulties |
3.21 |
11 |
3.08 |
9 |
3.09 |
6.5 |
9 |
| Consultant |
Contract management |
2.93 |
24 |
2.54 |
23.5 |
2.91 |
14 |
22.5 |
|
Approval of shop drawings |
3.46 |
5 |
3.17 |
6 |
3.18 |
4 |
3 |
|
QA/QC |
2.93 |
24 |
2.43 |
29 |
2.27 |
33 |
29 |
|
Inspections and testing procedure used in the project |
2.5 |
30.5 |
2.50 |
26 |
2.29 |
31 |
31 |
|
Design errors |
3.57 |
3 |
2.88 |
15.5 |
2.82 |
18.5 |
10.5 |
|
Deficiencies in cost estimates prepared |
3.00 |
19.5 |
3.21 |
5 |
3.32 |
3 |
6.5 |
| Material |
Quality of material |
2.00 |
39 |
2.21 |
34 |
2.32 |
30 |
35.5 |
|
Shortage of material |
2.79 |
26.5 |
2.88 |
15.5 |
2.82 |
18.5 |
19.5 |
|
Material procurement |
3.14 |
13.5 |
2.92 |
13 |
2.82 |
18.5 |
15 |
|
Material changes in types and specifications during construction |
2.36 |
34 |
2.04 |
37 |
2.23 |
36 |
37 |
| Labour |
Labour supply |
3.00 |
19.5 |
2.67 |
21.5 |
2.23 |
36 |
25 |
|
Labour productivity |
3.07 |
15.5 |
3.00 |
10.5 |
2.59 |
25.5 |
17.5 |
|
Shortage of technical and skilled personnel |
3.57 |
3 |
3.26 |
4 |
2.91 |
14 |
6.5 |
| Machinery and equipment |
Shortage of equipment and spare parts |
3.07 |
15.5 |
2.92 |
13 |
2.91 |
14 |
13 |
|
Equipment failure |
3.00 |
19.5 |
2.79 |
19 |
2.59 |
25.5 |
22.5 |
|
Equipment productivity |
3.14 |
13.5 |
2.83 |
17.5 |
2.73 |
22 |
17.5 |
| Contractual relationship |
Major disputes and negotiations |
3.00 |
19.5 |
2.17 |
35.5 |
2.68 |
23 |
27 |
|
Inappropriate overall organizational structure linking all parties to the project |
3.00 |
19.5 |
2.54 |
23.5 |
2.91 |
14 |
21 |
|
Mistakes and discrepancies in contract documents |
2.93 |
24 |
2.50 |
26 |
2.36 |
29 |
26 |
| External |
Weather conditions |
1.93 |
40 |
1.83 |
40.5 |
2.23 |
36 |
40 |
|
Inflation |
2.14 |
36 |
2.42 |
30 |
2.82 |
18.5 |
28 |
|
Changes in regulations and standards |
1.79 |
42 |
1.83 |
40.5 |
1.95 |
40.5 |
41 |
|
Problems with neighbours and site conditions |
2.21 |
35 |
2.00 |
38.5 |
2.27 |
33 |
38 |
|
Political issues |
2.43 |
32.5 |
2.00 |
38.5 |
2.27 |
33 |
35.5 |
| Special factors in dam construction |
Unforeseen ground conditions |
3.31 |
8 |
3.09 |
8 |
3.33 |
2 |
4 |
|
Extreme floods |
3.00 |
19.5 |
3.00 |
10.5 |
2.81 |
21 |
15 |
|
Environmental impacts |
2.43 |
32.5 |
2.50 |
26 |
2.05 |
38 |
32 |
|
Inadequate investigations in borrow areas |
3.21 |
11 |
2.83 |
17.5 |
2.95 |
10.5 |
12 |
