Serial number	Factors affecting hidden costs in the construction phase of construction projects	Average score
1	Initiative for staff work C₁	3.25
2	Information flow control level C₂	3.56
3	Professional competence and technical level C₃	3.12
4	Information collection, organization and analysis capabilities C₄	3.45
5	Subcontract management C₅	3.88
6	Mechanical equipment repair and maintenance C₆	2.96
7	Leadership decision level C₇	3.02
8	The degree of perfection of the system and mechanism C₈	3.03
9	Information transfer rate C₉	3.21
10	Safety production management C₁₀	2.86
11	Management organizational structure design C₁₁	4.00
12	Quality assurance C₁₂	3.88
13	Construction schedule C₁₃	4.00
14	Duration guarantee C₁₄	3.21
15	Determination of major construction steps and technical plans C₁₅	3.56
16	Construction deployment and selection of construction methods C₁₆	4.00
17	Construction site layout C₁₇	3.89
18	Construction machinery and equipment selection C₁₈	2.56
19	Progress payment amount C₁₉	2.88
20	Project changes C₂₀	3.68
21	Pad production C₂₁	3.84
22	Timeliness of claim C₂₂	3.02
23	Material equipment supply C₂₃	4.00
24	Contract clause modification C₂₄	2.88
25	Change in raw material prices C₂₅	3.54
26	force majeure C₂₆	2.55
27	Changes in laws and regulations C₂₇	3.86
28	Industry policy adjustment C₂₈	3.64
29	Engineering geological conditions C₂₉	2.75
30	Inflation C₃₀	2.54
31	Social security around the project C₃₁	2.65