Risk groups

Cronbach’s alpha Ri

High-impact causes

Cronbach’s alpha Ri

Causes that have a small impact (eliminated)

Risks of natural and social factors

(R1)

0.886

r1.1;

r1.5;

r1.8;

r1.9;

0.831

0.843

0.888

0.847

r1.2; r1.3;

r1.4; r1.6; r1.7

Risks due to contracts

(R2)

0.852

r2.1;

r2.2,

r2.6

0.656

0.981

0.681

r2.3; r3.4; r3.5

Risks due to economy

(R3)

0.814

r3.2;

r3.3;

r3.4;

r3.5

0.704

0.822

0.825

0.701

r3.1; r3.6; r3.7

Risks due to project management

(R4)

0.900

r4.1;

r4.3;

r4.6;

r4.9

0.862

0.872

0.876

0.873

r4.2; r4.4; r4.5; r4.7; r4.8

Risks due to design consulting work

(R5)

0.718

r5.2;

r5.5,

r5.6;

r5.7;

0.710

0.645

0.667

0.598

r5.1; r5.3; r5.4

Risks due to the contractor’s construction capacity

(R6)

0.872

r6.1;

r6.2;

r6.3;

r6.5

0.813

0.839

0.864

0.829

r6.4; r6.6

Risks due to administrative and legal procedures

(R7)

0.743

r7.4;

r7.5;

r7.6;

r7.7

0.641

0.727

0.749

0.605

r7.1; r7.2; r7.3