A Multiscale Differential Evolution Algorithm-Based Maintenance Plan Optimization for Building Energy Retrofitting

Table 4

Optimal maintenance time schedules.

Time schedule	Budget limit ($)	Maintenance number	Maintenance instants
	20,000	6	{14,26,38,50,62,74,86}
	20,000	5	{14,26,38,50,62,74}
	40,000	12	{8,18,28,…,98}
	40,000	12	{8,18,28,…,98}
	65,000	34	{5,8,11,…,104}
	65,000	34	{8,11,14,…,107}