The precedence diagram method (PDM) is a tool for scheduling activities in a project plan. It is a method of constructing a project schedule network diagram that uses boxes, referred to as nodes, to represent activities and connects them with arrows that show the dependencies. It is also called the activity-on-node (AON) method.
Critical tasks, noncritical tasks, and slack timeShows the relationship of the tasks to each otherAllows for what-if, worst-case, best-case and most likely scenarioKey elements include determining predecessors and defining attributes such as
early start date..late start dateearly finish datelate finish datedurationactivity nameWBS referenceSlack/Float: Determines the duration of activity delay that the project can tolerate before the project comes in late. The difference between the earliest and the latest start time. i.e. Slack = last start date - early start day or Slack = last finish time - early finish time.
Any activities which have a slack of 0, they are on the critical path.
Different Precedence diagram Methods
Arrow diagramming methodProject networkCritical-path methodGantt chartProgram evaluation and review technique referenceEver curious about what that abbreviation stands for? fullforms has got them all listed out for you to explore. Simply,Choose a subject/topic and get started on a self-paced learning journey in a world of fullforms.
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