IASSC® Certified Lean Six Sigma Green Belt™ — Lesson 1: Green Belt Foundations, Customer Value, Project Selection, and Process Definition

Learning Objectives

• Explain the roles, information, criteria, dependencies, and decision points governing DMAIC and process mapping.
• Implement or assess customer requirements, project charter, and process scope using controlled evidence and acceptance criteria.
• Evaluate the condition where the planned DMAIC result cannot be trusted because process mapping scope, ownership, or prerequisite evidence is incomplete and select a proportionate corrective response.

Detailed Topics

• DMAIC applied to the course scenario, expected behavior, stakeholders, controls, risks, and evidence.
• process mapping applied to the course scenario, expected behavior, stakeholders, controls, risks, and evidence.
• customer requirements applied to the course scenario, expected behavior, stakeholders, controls, risks, and evidence.
• project charter applied to the course scenario, expected behavior, stakeholders, controls, risks, and evidence.
• process scope applied to the course scenario, expected behavior, stakeholders, controls, risks, and evidence.

Instructor Demonstration

The instructor traces an improvement team using Green Belt methods to reduce waste, variation, defects, and process delay while sustaining measurable gains. The walkthrough connects frameworks, processes, tools, decisions, and evidence captured in the Green Belt project charter, process map, analysis workbook, and control plan. It also tests the exception where the planned DMAIC result cannot be trusted because process mapping scope, ownership, or prerequisite evidence is incomplete.

Hands-On Exercise

Complete a controlled PeopleCert-aligned exercise covering Green Belt Foundations, Customer Value, Project Selection, and Process Definition and preserve the verified result in the Green Belt project charter, process map, analysis workbook, and control plan.

1. Confirm scope, roles, criteria, prerequisites, information sources, dependencies, and acceptance conditions.
2. Execute the service, project, portfolio, risk, Lean, or operational workflow while recording decisions and evidence.
3. Test normal behavior, one boundary condition, and the stated exception using a controlled scenario.
4. Document findings, corrections, ownership, retest criteria, communication, and operational handover.

Scenario Analysis

• Identify which role, process, objective, control, information source, or decision most strongly influences DMAIC.
• Compare two defensible responses and explain service, project, quality, risk, operational, and business trade-offs.
• Determine how the Green Belt project charter, process map, analysis workbook, and control plan should be approved, retained, reviewed, retested, and updated.

Troubleshooting Guidance

Start where expected behavior first differs from the observed result. Check scope, criteria, ownership, data quality, process sequence, policy alignment, version compatibility, dependencies, status, and evidence separately. Treat “the planned DMAIC result cannot be trusted because process mapping scope, ownership, or prerequisite evidence is incomplete” as a hypothesis until records, interviews, configurations, calculations, and retest outcomes confirm the cause.

Validation Checklist

• Required roles, processes, criteria, controls, information, approvals, and dependencies are present.
• The Green Belt project charter, process map, analysis workbook, and control plan connects each conclusion to objective, reviewable evidence.
• Normal processing, a boundary condition, dependency behavior, and the stated exception were tested.
• Corrections, ownership, retest criteria, documentation, communication, and operational handover are complete.

Lesson Outcome

Learners can apply Green Belt Foundations, Customer Value, Project Selection, and Process Definition, explain the resulting service, project, quality, risk, or operational behavior, and defend the outcome through the Green Belt project charter, process map, analysis workbook, and control plan.