The percentage of a resource’s available time that will be spent on a task. For example, 100% effort is full time.
          
A chart that graphically represents the tasks and milestones and the dependency network of a project. PERT stands for “Program Evaluation Review Technique.” In MacProject II, the Schedule Chart is a PERT chart.
     
A group of related tasks that make up a stage of a project’s work.
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An item on the screen that can be selected as a unit and manipulated. In MacProject II, boxes, bars, pictures, legends, and annotations are objects.
                     
A resource whose work load exceeds its level of availability, as shown in the Resource Histogram. You can alleviate the problem by using the resource leveler or by making schedule changes yourself.
            
Two or more tasks whose work can be done at the same time.