Given two activities A1 and A2, the transition time between A1 and A2 on a resource R is the amount of time that must elapse between the end of A1 and the beginning of A2, when A1 precedes A2 on resource R.

A transition time (instance of IloTransitionTime) can be created on a resource.

By default, the transition time on a resource is not suspended by the breaks defined on that resource. The member function IloTransitionTime::setSuspended allows specifying a transition time that is suspended by the breaks of the resource. See Breaks and Transition Times for an illustration of suspended transition times.

A parameter associated with each resource allows one to change the level of enforcement of transition times (member functions IloResourceParam::getTransitionTimeEnforcement and IloResourceParam::setTransitionTimeEnforcement). The semantics of these levels depends on the scheduler.

The list of time intervals over which the transition times must be enforced is given as a parameter of the resource, and can be modified with the member functions IloResource::addTransitionTimeEnforcementInterval, and IloResource::removeTransitionTimeEnforcementInterval.

An instance of IloTransitionTime associates a resource with either a transition parameter (instance of IloTransitionParam) or a user-defined transition time object (subclass of IloTransitionTimeObject.)

A transition parameter (instance of IloTransitionParam) is a square table describing the transition between activities, with two arrays describing the activity setup and teardown values. An integer transition type is associated with each activity. The accessors are the functions IloActivity::getTransitionType and IloActivity::setTransitionType. They allow you to define instances of IloTransitionTime from IloTransitionParam where the arrays are indexed by the transition types of activities.

Note that when a transition time defined with an IloTransitionParam is associated with a resource, activities of different types cannot overlap on that resource.

A transition time object is a subclass of IloTransitionTimeObject defined with the macro ILOTRANSITIONTIMEOBJECT0.

This macro makes it easy to define your own transition time together with its extraction function, in case a simple square table as the one provided by IloTransitionParam is not sufficient for your purposes.

See Also

IloActivity, IloTransitionTime, IloTransitionParam, IloResource, IloTransitionTimeObject, ILOTRANSITIONTIMEOBJECT0, IloResourceParam.