Enumeration IloTimeExtent

By default, an activity uses a resource throughout its execution; that is, from the start time of the activity to the end time of the activity. However, it is possible to specify a time range different from the default " start to end " range. The enumeration IloTimeExtent is defined for this purpose.

IloNever indicates that the activity requires (or provides) the resource at no time.

IloAlways indicates that the activity requires (or provides) the resource at all times (that is, before its start time, from its start time to its end time, and after its end time). IloAlways is useful for optimizing the maximal available capacity of a resource.

IloBeforeStart indicates that the activity requires (or provides) the resource at all times before its start time.

IloAfterStart indicates that the activity requires (or provides) the resource at all times after its start time (including after its end time). This time extent is useful when an activity consumes a reservoir; for example, when part of a budget is spent for the performance of the activity.

IloAfterEnd indicates that the activity requires (or provides) the resource at all times after its end time. This time extent is useful when an activity produces a reservoir; for example, when finished goods are produced in a factory.

IloBeforeEnd indicates that the activity requires (or provides) the resource at all times before its end time (that is, from before its start time up to its end time). This time extent is useful when some activities require resources that have never been used before; for example, when brand-new bank notes are used to test the prototype of an automatic teller machine (ATM).

IloBeforeStartAndAfterEnd indicates that the activity requires (or provides) the resource at all times before its start time and after its end time.

IloFromStartToEnd indicates that the activity requires (or provides) the resource from its start time to its end time. This is the default time extent.