WBS Dictionary
EVM Terms
Reviewed by forProject Technology - updated Sep 2026
Quick definition: The WBS Dictionary is a document that gives a brief narrative definition of each element of the Work Breakdown Structure, describing its work scope and deliverables.
Each entry explains what a specific WBS element covers, so there's no ambiguity about what work and deliverables belong under it. It's typically maintained alongside the WBS as project scope is defined and refined.
Why it matters
The WBS Dictionary is what keeps a WBS from being just a list of boxes and labels -- it's the reference that tells everyone exactly what's included in each piece of work. That clarity helps prevent scope gaps and overlaps between control accounts and work packages.
Also known as
N/A
Used in
Work Breakdown Structure development
FAQ
Is the WBS Dictionary the same document as the WBS itself?
No -- the WBS is the structure of work elements, while the WBS Dictionary is the companion document that defines what each element actually includes.
Who typically maintains the WBS Dictionary?
The project team responsible for scope definition, updating it as the WBS is refined.
Definition maintained by forProject Technology.
© 2026 forProject Technology, Inc.
© 2026 forProject Technology, Inc.
