Work Package
A work package is the lowest level of the work breakdown structure, representing a deliverable or project work component that can be estimated, scheduled, monitored, and controlled.
Explanation
Work packages sit at the bottom of the WBS hierarchy and represent the smallest units of deliverable-oriented work that the project team defines during scope planning. They are the point at which cost and duration can be reliably estimated, work can be assigned to a responsible individual or team, and performance can be tracked.
During the Define Activities process in Schedule Management, work packages are further decomposed into activities (the actual tasks to be performed). This distinction is important: the WBS ends at the work package level, and activities are defined in the schedule, not in the WBS.
Work packages are typically described in detail in the WBS dictionary with attributes such as a code of account identifier, a statement of work, responsible organization, schedule milestones, acceptance criteria, and cost estimates. The size of a work package follows the general guideline of the 8/80 rule, meaning it should require between 8 and 80 hours of effort, though this is a guideline rather than a strict rule.
Key Points
- •Lowest level of the WBS hierarchy
- •Can be reliably estimated, scheduled, and controlled
- •Further decomposed into activities during Define Activities
- •Follows the 8/80 guideline (8 to 80 hours of effort)
Exam Tip
Activities are NOT part of the WBS. The WBS stops at the work package level. Activities are created from work packages during the Define Activities process in Schedule Management.
Frequently Asked Questions
Related Topics
Work Breakdown Structure (WBS)
A work breakdown structure (WBS) is a hierarchical decomposition of the total scope of work to be carried out by the project team to accomplish the project objectives and create the required deliverables.
WBS Dictionary
The WBS dictionary is a document that provides detailed deliverable, activity, and scheduling information about each component in the work breakdown structure.
Control Account
A control account is a management control point where scope, budget, actual cost, and schedule are integrated and compared to earned value for performance measurement.
Planning Package
A planning package is a WBS component below the control account with known work content but without detailed schedule activities, used as a placeholder for future planning.
Decomposition
Decomposition is a technique used to divide and subdivide the project scope and deliverables into smaller, more manageable parts until the work is defined at the work package level.
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