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WBS Builder

Create a numbered work breakdown structure with deliverables, work packages and owners.

Free · No signup · Works in your browser

WBS workspace

Break the project into numbered deliverables and work packages. Child numbering updates automatically after every structural change.

WBS items

4

Levels

2

Work packages

3

WBSDeliverable / work packageDescriptionOwnerStructure
1
1.1
1.2
2
Changes are saved automatically in this browser.No signup · No server upload

WBS data remains on your device and can be exported as JSON or CSV.

What is a work breakdown structure?

A work breakdown structure, or WBS, divides the complete project scope into progressively smaller deliverables and work packages. It helps teams define what must be delivered before dates, costs and responsibilities are assigned.

How to use the WBS Builder

  1. Step 1Add the project's main deliverables at the highest level.
  2. Step 2Create and indent child items until each branch reaches manageable work packages.
  3. Step 3Review numbering and ownership, then export the structure for planning and control.

Formula / How it works

WBS codes are derived automatically from item order and hierarchy level.

Example

Structure a project as 1 Design, 1.1 Concept Design and 1.2 Detailed Design.

WBS Builder FAQ

Should a WBS be organized by deliverables or activities?

A deliverable-oriented structure is usually clearer because it defines project scope and outputs. Activities can then be developed in the schedule beneath those work packages.

How detailed should a WBS be?

Decompose until a work package can be estimated, assigned and controlled reliably, but avoid detail that adds administration without improving control.

Is a WBS the same as a Gantt chart?

No. A WBS organizes scope hierarchically, while a Gantt chart adds dates, durations and dependencies to schedule the work.

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