Duration Type

Duration Type field

Determines how remaining duration, units, and units/time are calculated when you update an activity that has resources assigned. The activity's duration type should correspond to the dominant factor, that is, the least flexible factor in the project: schedule, costs/work effort, or resource availability.

Fixed Units/Time: The resource units per time are constant when the activity duration or units are changed. Use this duration type when an activity has fixed resources with fixed productivity output per time period.

Fixed Duration & Units/Time: The activity duration is constant as the units or resource units per time are changed. Use this duration type when the activity must be completed within a fixed time period regardless of the resources assigned.

Fixed Units: The activity units are constant when the duration or resource units per time are changed. Use this duration type when the total amount of work is fixed, and increasing the resources can decrease the activity duration.

Fixed Duration & Units: The duration and units remain constant as the units/time is changed. Use this duration type when the activity must be completed within a fixed time period and the total amount of work is fixed.