MS Project: Task Types

1. Fixed Units: Units = Work / Duration
Adding/removing resources will
a) decrease/increase the duration
b) increase/decrease the work

2. Fixed Duration: Duration = Work / Units
Adding/removing resources will
a) increase/decrease the units (%) of each resource
b) increase/decrease the work

3. Fixed Work: Work = Units * Duration
Adding/removing resources will always decrease/increase the duration

* Set on-going PM tasks to non-effort driven fixed duration type of task.