PMI considers an activity to
be a particular piece of
work scheduled for the
project.
Work package
The work package is the
lowest level on a WBS, the
higher levels are used to
categorize the work
packages.
Control account
Tool that allows for the analysis of work
performance data regarding
costs, schedule, and scope.
Control accounts provide a way
to manage and control costs,
schedule, and scope at a higher
level than the work package.