Precedence diagram method

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.

Key elements include determining predecessors and defining attributes such as Slack/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.

Slack = latest start date - earliest start day or Slack = latest finish time - earliest finish time.

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.