Precedence Diagramming Method (PDM) Glossary Definition

Precedence Diagramming Method (PDM) is a scheduling concept used to plan, sequence, measure, or control project work. It helps project teams understand timing, dependency logic, and the effect of schedule changes on delivery commitments.

Project schedulers and team leads use this concept when building schedule models, reviewing progress, and explaining the impact of delays or sequencing changes.

Related concepts include Activity, Task, Duration, Project Dependency, Critical Path and Float.