Duration keywords provide a flexible and simple
way to change task durations without having to view each task and make
the changes. You can change duration keywords in one place and the duration
value of multiple tasks will be updated.
This
feature enables users to add project template duration keywords for WBS
tasks and slack time (lead/lag) duration values as configurable settings
in projects. Within a project WBS, project leaders can map and assign
actual duration values to these variables settings. The actual duration
value mapping of these duration keyword will occur during project creation
from a project template or can be edited from the WBS.