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Decomposition

A method for breaking the project scope and deliverables into progressively smaller, easier-to-manage components that can be planned, estimated, and assigned.

Key Points

  • Used when creating the WBS and defining activities to structure work.
  • Continue breaking down work until items can be reliably estimated, scheduled, and owned (work package level).
  • Improves scope clarity, reduces ambiguity, and helps uncover assumptions and risks.
  • Typical outputs are the WBS, WBS dictionary, and activity lists with clear responsibilities.

Example

In a data center migration project, the team splits the overall migration into phases (assessment, design, build, migrate, validate). They then decompose the "migrate" phase into server groups and further into tasks such as backup, cutover, verification, and rollback, each with estimates and assigned owners.

PMP Example Question

While developing the WBS, the project team iteratively breaks high-level deliverables into work packages that can be estimated and assigned. What technique are they using?

  1. Rolling wave planning
  2. Decomposition
  3. Delphi technique
  4. Parametric estimating

Correct Answer: B — Decomposition (breaking scope and deliverables into smaller, manageable parts)

Explanation: Decomposition is used to break deliverables into lower-level components to create the WBS. Rolling wave is about planning detail over time; Delphi gathers expert consensus; parametric is an estimating approach.

ICS/OT Cybersecurity Fundamentals — Security Built for Industrial Systems

Industrial control systems cannot be secured like ordinary IT. A forced reboot, aggressive scan, or incompatible patch can interrupt production and create real safety consequences. Effective OT security begins with understanding the systems, constraints, and risks unique to industrial environments.

This course gives IT professionals, engineers, operators, and security practitioners a practical foundation in ICS threats, zone and conduit design, risk assessment, passive asset visibility, and vendor evaluation. You will learn how IEC 62443, NIST CSF, and MITRE ATT&CK for ICS apply where availability and safety come first.

Eight reconstructed incidents—including Stuxnet, Triton, Ukraine 2015, Colonial Pipeline, and PIPEDREAM—show how attackers move through OT environments, what they target, and which defenses could have changed the outcome.

Watch the course preview, then build the vocabulary, frameworks, and judgment needed to take credible first steps in ICS/OT cybersecurity.

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ICS/OT Cybersecurity Fundamentals course preview

Build an ICS/OT cybersecurity foundation that fits the real environment

Standard IT controls can disrupt the industrial systems they are meant to protect. Learn how to assess OT risk, design zones and conduits, apply IEC 62443 security levels, use MITRE ATT&CK for ICS, and establish passive asset visibility without risking production. Eight reconstructed incidents connect attacker techniques to the controls that failed, giving you the vocabulary and judgment to make credible security decisions from day one.

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