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One, DMAIC Project Dies Due to Unclear Charter

Six Sigma projects often drag on for 2 months in the Define phase: the scope keeps expanding, sponsors are absent, and Y definitions keep changing—Often, this is not due to the lack of Black Belt capability, but rather because the project Charter (Task Book) was not clearly written, signed off, and strictly gated at the beginning.

The Charter serves as a contract between the sponsor, finance, Master Black Belt, and team: what to do, what not to do, what success looks like, and when to stop.

Two, Ten Elements of the Charter

1. Business Case (Commercial Justification): Linked to strategy/quality objectives
2. Problem Statement: Observable, measurable, no cause, no solution
3. Goal / Y: SMART, baseline + target + completion date
4. Scope (In/Out): Process start and end, product/line, geographical scope
5. Benefits (Financial/Quality): Hard benefit estimation methods
6. Team & Roles: Champion, BB/GB, process Owner
7. Milestone & Tollgates: Completion criteria for each phase
8. Resources: Human resources, data, external support
9. Risks: Unavailable data, cross-departmental resistance, etc.
10. Approval: Sponsor's signature date

A one-page Charter with an appendix of data is sufficient; avoid 30-page presentations.

Three, Problem Statement Writing Template

"In the [process/product], [phenomenon] leads to [quantified impact], occurring within [time frame], limited to [In Scope]."

Negative Example: "Welding quality needs improvement." Positive Example: "On Line 3, the PPM of resistance welding defects increased from 1200 to 2100 (2026Q1), causing rework costs of approximately 180,000 RMB/month, limited to the welding and air-tightness inspection processes on Line 3."

Four, Y and Operational Definition

• Y must be directly measurable (PPM, cycle time, Cpk)
• Clearly define operational definitions: who measures, what measuring tool, sampling, calculation formula
• For multi-Y projects, select a Primary Y for Tollgate, the rest as Secondary

Five, Tollgate (Phase Gate) Evaluation Criteria

No-Go: The sponsor can pause, scale down, or change the topic, which must be documented in writing.

Six, Financial Benefit Verification

• In the Define phase, estimation methods (COQ, rework hours × rate)
• In the Control phase, actual vs. predicted tracking for 12 weeks
• Report hard benefits and soft benefits separately to avoid overestimation

Green Belt/Black Belt projects without benefit estimation are not initiated (except for learning projects).

Seven, Project Types and Path Selection

Eight, Common Pitfalls

Scope Creep: Adding product lines mid-project → Requires Charter Change and re-signing. Sponsor Absence: No decision at Tollgate → MBB escalates. Unmeasurable Y: Changing Y later = project restart. No Process Owner in the Team: Countermeasures cannot be implemented.

Nine, Charter Review Meeting (90-Minute Agenda)

1. Sponsor states business pain points (10min)
2. BB presents Problem/Y/Scope (20min)
3. Finance challenges benefits (15min)
4. MBB challenges data and scope (20min)
5. Go/No-Go/Conditional Go (15min)
6. Document release (10min)

Ten, Integration with the Six Sigma Series

Green Belt/Black Belt training (6.1.3) teaches tools; Charter and Tollgate teach project governance. It is recommended that the MBB Office maintain Charter templates and a project dashboard (phases, Y trends, benefits).

Eleven, One-Page Charter Template (Field List)

Title / Sponsor / BB·GB / Date / Business Case (3 lines) / Problem / Goal Y (baseline → target → date) / Scope In·Out / Team / Milestones / Benefits / Risks / Sign-off

Twelve, Boundary with DFSS

If the Charter reveals that the current process cannot meet CTQ, stop DMAIC and switch to DMADV or design changes, rather than forcing the Improve phase. Creating a design decision tree after the Tollgate Analyze is a key responsibility of the MBB.

Thirteen, Project Portfolio Management

The MBB Office maintains the project pipeline: no more than 2 times the number of BBs can be active DMAIC projects simultaneously; Charter queuing is prioritized by strategic alignment and benefits, not on a first-come, first-served basis.

Fourteen, Differences Between Green Belt and Black Belt Charters

Green Belt projects focus on a single process, ≤12 weeks; Black Belt projects are cross-functional and may include multiple Ys. Charter templates are tiered to prevent Green Belt projects from failing due to an overly broad scope.

Fifteen, Tollgate Document Package Checklist

Define: Charter, SIPOC, VOC/CTQ (if applicable) Measure: Data plan, MSA, baseline Y Analyze: Hypothesis testing/experimental report, key Xs Improve: Pilot data, updated FMEA Control: CP, SOP, control chart, benefit report

Sixteen, Sponsor Time Commitment (Included in Charter)

Sponsors must commit at least 1 hour per phase gate; absence results in Tollgate delay, and email tacit approval is not allowed. The Champion's proxy must have written authorization.

Seventeen, Post-Mortem of Failed Projects

Conduct a Lessons Learned session for No-Go / Terminated projects: which Charter clause was vague, whether Y was measurable, whether the scope was out of control—input these into the MBB Office to improve templates.

Eighteen, Series Map (6.1 Six Sigma)

Black Belt classes must submit a Charter draft in the first week, and Tollgate Define must pass by the second week to proceed to Measure.

Nineteen, Top 5 Common Reasons for Charter Rejection

1. No baseline data for Y
2. Scope includes the entire factory
3. Benefits cannot be estimated
4. No process Owner
5. Problem statement includes solutions ("MES needs to be implemented")

The success of DMAIC is 50% determined before the Measure phase—the Charter is the decisive judge.

Before initiating the project, ask: If Y improves by only 10% after 12 weeks, would the sponsor still consider the project worthwhile? Clearly define expectations and the stop-loss line in the Charter.

Knowledge Number: 6.1.1

Version: v20260702

Author: Quality Excellence Think Tank Quality Excellence Think Tank is dedicated to providing systematic professional knowledge, methodologies, and practical tools for quality management practitioners, supporting continuous improvement in corporate quality capabilities.