Optimization of Flow Shop Scheduling in Precast Concrete Component Production via Mixed-Integer Linear Programming

Table 3

Completion time of each process based on MILP.

Component production sequence	Process completion time (h)						Delay time (h)	Restoring time (h)
	Mold assembling	Reinforcement setting	Concrete casting	Curing	Mold removal	Finishing/repairing
4	0.3	0.7	1.2	24	24.4	25.4	—	2.6
2	2	4	6	24	25.9	28.4	0.4	—
3	2.4	4.5	6.6	24	26.4	28.4	0.4	—
1	3.4	5.3	7.8	24	27.9	28.9	0.9	—
6	4.9	6.9	9.3	24	29.7	30.5	—	1.5
5	6.4	24.7	25.9	48	49.5	51^∗	—	1
Total delay time (h)							1.7	—
Total restoring time (h)							—	5.1

^∗Orders complete time.