Robust Proactive Project Scheduling Model for the Stochastic Discrete Time/Cost Trade-Off Problem

Table 1

Computations for the example problem.

	Mode		Total cost	Makespan	Feasible
	Activity 3	Activity 4
0	1	1	86	7	No
	1	2	77	9	No
	2	1	74	13	Yes
	2	2	65	13	Yes
1	1	1	86	7	No
	1	1^*	89	7	No
	1	2	77	9	No
	1	2^*	80	10	No
	1^*	1	90	9	No
	1^*	1^*	93	9	No
	1^*	2	81	9	No
	1^*	2^*	84	10	No
	2	1	74	13	Yes
	2	1^*	77	13	No
	2	2	65	13	Yes
	2	2^*	68	13	Yes
	2^*	1	78	15	No
	2^*	1^*	81	15	No
	2^*	2	69	15	Yes
	2^*	2^*	72	15	Yes
2	1^*	1^*	93	9	No
	1^*	2^*	84	10	No
	2^*	1^*	81	15	No
	2^*	2^*	72	15	Yes

This mode uses the worst-case value.