Payment Scheduling Problem with Multiple Modes for Activities to Maximize the Net Present Value of a Project

Table 2

Operators, parameters, and their levels (GA).

Factor	Symbol	Level	Type
Temp		Small problems	B(1) = 10, B(2) = 20, B(3) = 30
		Medium problems	B(1) = 40, B(2) = 50, B(3) = 60
		Large problems	B(1) = 80, B(2) = 100, B(3) = 120
Repeat		Small problems	C(1) = 0.6, C(2) = 0.7, C(3) = 0.8
		Medium problems	C(1) = 0.7, C(2) = 0.8, C(3) = 0.9
		Large problems	C(1) = 0.7, C(2) = 0.8, C(3) = 0.9
		Small problems	C(1) = 0.05, C(2) = 0.07, C(3) = 0.09
		Medium problems	B(1) = 0.05, B(2) = 0.07, B(3) = 0.09
		Large problems	B(1) = 0.05, B(2) = 0.07, B(3) = 0.09