Precedence diagram method: Difference between revisions

Revision as of 17:14, 20 April 2016

Revision as of 02:36, 7 June 2016

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The '''precedence diagram method (PDM)''' is a tool for [[SchedulingSchedule (productionproject processesmanagement)|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 [[Dependency (project management)|dependencies]]. It is also called the activity-on-node (AON) method.

* Critical [[Task (project management)|tasks]], noncritical tasks, and slack time

* Shows the relationship of the tasks to each other

* Allows for what-if, worst-case, best-case and most likely scenario

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* early finish date

* late finish date

* [[Duration (project management)|duration]]

* activity name

* [[Work breakdown structure|WBS]] reference

Slack/[[Float (project management)|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 method|critical path]].

[[File:TinhSoDoMangPDM.png|thumbnail|right|solving the PDM, with: BS is an early start date. BM is a late start date. KS is an early finish date. KM is a late finish date.]]