Recently, time-switch constraints have been introduced in literature by Yang and Chen (2000). Basically, these constraints impose a specified starting time on the project activities and force them to be inactive during specified time periods. This type of constraints have been incorporated into...

The problem of allocating scarce resources over time to perform a given set of activities - that is, project scheduling - appears in the vast spectrum of real-world situations. Over the last forty years project scheduling problems have been carefully studied, resulting in a considerable body of...

Over recent years, a fairly large number of project scheduling problems have been focused on maximizing the Net Present Value (NPV) of cash flows during the project. From the contractor's point of view, cash inflows generally represent their revenues, and cash outflows are expenditures. In most...