Optimizing Construction Project Labor Utilization Using Differential Evolution: A Comparative Study of Mutation Strategies

Table 2

Example of activity duration calculation.

Activity number	Required working hour (hour)	Crew size (person)	Calculated duration (shift)	Rounded duration (shift)
1	100	5	2.5 = 100/(5 8)	3 = ceil(2.5)
2	220	5	5.5	6
3	380	10	4.8	5
4	210	5	5.3	6
5	520	5	13.0	13
6	220	5	5.5	6
7	370	10	4.6	5
8	380	10	4.8	5
9	320	5	8.0	8
10	630	10	7.9	8
11	100	7	1.8	2

Note: each shift lasts 8 hours.