Table 4 Correlation costs and times...

Table 4

Correlation costs and times

Structure	Correlation	Cost			Time
Structure	Correlation	Mean	P90th	P90th: increased %	Mean	P90th	P90th: increased %
Earthwork	Base case	268 726 606.90	271 089 094.40	10.97	222.19	225.59	4.93
	Type 1	268 692 562.60	286 766 429.79	17.39	222.19	249.18	15.90
	Type 2	268 608 078.40	298 968 508.46	22.38	222.32	253.63	17.97
	Type 3	268 530 325.90	292 373 016.20	19.68	222.78	254.45	18.35
Bridge	Base case	78 030 393.34	80 577 949.52	13.57	351.35	357.78	5.23
	Type 1	78 044 588.91	85 920 760.74	21.10	351.36	396.52	16.62
	Type 2	78 113 067.80	86 205 928.64	21.50	351.46	392.89	15.56
	Type 3	78 065 388.98	86 085 866.87	21.33	349.72	381.19	12.12
Pavement	Base case	543 664 957.99	548 997 579.66	11.07	224.22	227.62	4.90
	Type 1	543 716 702.76	588 988 971.85	19.17	224.28	239.00	10.14
	Type 2	543 899 815.54	612 440 433.36	23.91	224.41	241.64	11.35
	Type 3	543 558 761.37	596 935 711.88	20.77	224.24	239.16	10.21
Overall project	Base case	821 606 531.66	896 942 973.77	10.80	341.54	357.67	5.20
	Type 1	889 994 457.90	939 759 672.15	16.09	351.45	395.32	16.27
	Type 2	889 203 018.70	962 076 539.65	18.85	351.23	392.52	15.45
	Type 3	892 317 669.00	949 067 831.41	17.24	351.23	381.25	12.13

Structure	Correlation	Cost			Time
Structure	Correlation	Mean	P90th	P90th: increased %	Mean	P90th	P90th: increased %
Earthwork	Base case	268 726 606.90	271 089 094.40	10.97	222.19	225.59	4.93
	Type 1	268 692 562.60	286 766 429.79	17.39	222.19	249.18	15.90
	Type 2	268 608 078.40	298 968 508.46	22.38	222.32	253.63	17.97
	Type 3	268 530 325.90	292 373 016.20	19.68	222.78	254.45	18.35
Bridge	Base case	78 030 393.34	80 577 949.52	13.57	351.35	357.78	5.23
	Type 1	78 044 588.91	85 920 760.74	21.10	351.36	396.52	16.62
	Type 2	78 113 067.80	86 205 928.64	21.50	351.46	392.89	15.56
	Type 3	78 065 388.98	86 085 866.87	21.33	349.72	381.19	12.12
Pavement	Base case	543 664 957.99	548 997 579.66	11.07	224.22	227.62	4.90
	Type 1	543 716 702.76	588 988 971.85	19.17	224.28	239.00	10.14
	Type 2	543 899 815.54	612 440 433.36	23.91	224.41	241.64	11.35
	Type 3	543 558 761.37	596 935 711.88	20.77	224.24	239.16	10.21
Overall project	Base case	821 606 531.66	896 942 973.77	10.80	341.54	357.67	5.20
	Type 1	889 994 457.90	939 759 672.15	16.09	351.45	395.32	16.27
	Type 2	889 203 018.70	962 076 539.65	18.85	351.23	392.52	15.45
	Type 3	892 317 669.00	949 067 831.41	17.24	351.23	381.25	12.13

Base case: uncorrelated (variability cost and time)

Type 1: correlation between repeated activities in a structure

Type 2: correlation between activities in a structure

Type 3: correlation between cost and time of an activity

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