Robust Optimization for Time-Cost Tradeoff Problem in Construction Projects

Table 1

Engineering example.

Activity (𝑗)	Immediate predecessor	Construction model (m)	𝑑𝑗𝑚/day	Δ𝑑𝑗𝑚/day	𝑐𝑗𝑚/ten thousand	Δ𝑐𝑗𝑚/ten thousand
1		1	28	8	46	4
		2	40	8	36	7
		3	48	4	24	7
2	1	1	30	9	60	6
		2	36	7	48	9
		3	40	4	36	10
3	1	1	30	9	90	9
		2	44	8	80	16
		3	66	6	64	19
4	1	1	24	7	90	9
		2	32	6	70	14
		3	40	4	60	18
5	2.3	1	44	13	40	4
		2	48	9	35	4
		3	56	5	30	9
6	4	1	28	8	80	8
		2	36	7	64	12
		3	48	4	36	4
7	5.6	1	18	5	60	6
		2	30	6	48	9
		3	36	3	44	13