Statement of Work

In Lean Six Sigma (LSS) and the DMAIC framework, a Statement of Work (SOW) is a formal document that defines the scope, objectives, deliverables, and boundaries of a process improvement project. It sets the foundation during the Define phase and ensures alignment among stakeholders throughout the DMAIC cycle.

πŸ“Œ Purpose of a Statement of Work in LSS

  • Clarifies scope: Defines what the project will and will not address.

  • Aligns stakeholders: Ensures sponsors, team members, and customers share a common understanding.

  • Sets boundaries: Prevents scope creep by outlining constraints and exclusions.

  • Provides accountability: Establishes deliverables, timelines, and responsibilities.

  • Links to business goals: Connects the project to organizational strategy and customer requirements.

πŸ—‚οΈ Typical Components of a SOW in DMAIC

  1. Project Background – Why the project is needed (problem statement, business case).

  2. Objectives – Clear, measurable goals tied to customer value and process improvement.

  3. Scope – Defines process boundaries (start/end points, included/excluded activities).

  4. Deliverables – Tangible outputs (reports, improved process, training materials).

  5. Timeline & Milestones – Key dates aligned with DMAIC phases.

  6. Roles & Responsibilities – Sponsor, Champion, Black Belt, Green Belt, team members.

  7. Resources & Budget – Tools, data, and support required.

  8. Success Criteria – Metrics for improvement (e.g., defect reduction, cycle time improvement).

🎯 DMAIC Fit

  • Define Phase β†’ The SOW is created here as part of the Project Charter, setting the foundation for the project.

  • Measure Phase β†’ The SOW guides data collection boundaries and ensures focus on agreed scope.

  • Analyze Phase β†’ Keeps analysis aligned with defined objectives.

  • Improve Phase β†’ Ensures solutions stay within scope and deliverables.

  • Control Phase β†’ Provides reference for sustaining improvements and confirming project closure.

⚠️ Risks & Best Practices

  • Risk: Vague scope β†’ leads to scope creep and stakeholder conflict.

  • Best Practice: Use SMART objectives (Specific, Measurable, Achievable, Relevant, Time-bound).

  • Risk: Misaligned expectations.

  • Best Practice: Review and sign-off by sponsor and key stakeholders before Measure phase begins.

βœ… In short: The Statement of Work in DMAIC/LSS is the contract-like foundation document created in the Define phase that guides the project through all subsequent phases, ensuring clarity, alignment, and accountability.