Objective function:
• Minimize the construction costs.
Constraints: The first constraint is that each project has to be done on time. Second, no labor or equipment shortages exist on any day. Third, contractor has to spend no more than or equal to the predetermined payment received for each project.
• All project must be finished on time
• Avoid labor and equipment shortages to exist on any day
• Predetermined payment received for each project is the maximum cost of the project.