MENTAL MODEL · M6725

OBS

BusinessHigh supportManagement

Included

Version 1.0.0 · Updated 2026-07-30

CORE DEFINITION

Organization Breakdown Structure, a hierarchical decomposition of the project organization, clarifying the responsibilities of each unit, often combined with WBS to form a responsibility assignment matrix.

SCAFFOLDING EFFECT

psychology

Reduce cognitive load

Matching people and tasks. Assign work packages to specific responsible units, ensuring each task has a clear owner.

anchor

Anchor fast decisions

WBS decomposes 'things' (work packages), while OBS decomposes 'people/organizations' (departments, teams, roles). The intersection of the two forms a Responsibility Assignment Matrix (RAM), which assigns each task to a specific responsible unit, solving the matching problem of 'tasks have doers, people have tasks', avoiding responsibility gaps or overlaps.

MINIMUM ACTION

In progress 0/4

Practice this model in one real situation:

Decompose responsibility units according to the project organizational hierarchy (company → department → team → role).
Align with WBS work packages.
Use RAM (e.g., RACI) to mark the responsible person for each work package.
Check whether any work package has no responsible person or multiple people competing for management.

Check to track your progress (stored locally)

Learning progress0%

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Source support: Explicit

link
en.wikipedia.orghttps://en.wikipedia.org/wiki/OBSZH · Explicit
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