The Use of Project Time Management Processes and the Schedule Performance of Construction Projects in Mexico

Table 9

Mean SV values obtained for different periods of time (variance in number of weeks).

Projects	Performance at project completion	Mean SPI values
		4th week	8th week	12th week	Last week
1	Delayed	−1.59	−1.86	−1.85	−1.73
2	On time	0.73	0.90	0.57	0.57
3	Delayed	−0.23	−0.23	−0.31	−0.55
4	Delayed	−2.04	−2.06	−1.53	−1.34
5	Delayed	−0.31	−0.04	−0.02	−0.90
6	On time	3.06	2.71	2.38	1.90
7	On time	−0.22	−0.78	−0.56	−0.47
8	On time	0.04	−0.18	−0.11	−0.03
9	Delayed	−0.67	−0.74	−0.45	−0.61
10	Delayed	−1.24	0.25	0.61	−0.82
11	On time	2.59	2.35	1.81	1.31
12	Delayed	−1.74	−2.56	−2.15	−1.87
13	On time	−1.09	−2.13	−2.43	−2.10
14	On time	−0.86	−1.06	−1.04	−0.96

Projects that were granted an extension of time.