A resource break is a time interval during which the resource is not available for any activity. For example, breaks could include weekend or vacation time for workers, or maintenance time for machines. Breaks have a start time, an end time, and a duration, which can be either positive or null.
The example in this chapter shows how to model a problem that includes weekend breaks for all workers. The example includes some activities which cannot be interrupted by breaks, which means they must be started and finished in an interval between breaks.
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