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Six Sigma Methodology at Verso Measure CTQ Tools

Six Sigma Article 15


In the preceding article, we provided a comprehensive overview of the Critical to Quality (CTQ) concept and its associated tools, including Process Mapping, Pareto analysis, Fishbone diagram, FMEA, and  Quality Function Deployment. Building on that foundation, our exploration now directs attention to the final tool within the CTQ framework—the CTQ Drill Down Tree.

CTQ Tools:

Process Mapping – improving efficiencies

Pareto – using the 80-20 rule

Fishbone – getting to the root cause

FMEA (Failure Modes and Effects Analysis) – when the process is critical

Quality Function Deployment – when the customer “wants” are not well defined… “Diffused VOC”

CTQ Drill Down Tree – Alignment with the company’s key goals

CTQ Drill Down Tree:

The CTQ (Critical to Quality) drill-down tree tool serves as a valuable aid in selecting a project metric. It effectively illustrates the connection between the chosen project metric and the overarching goals of the company. Once this relationship is established, the tool becomes an instrumental resource in project management, guiding the identification and finalization of pertinent project metrics. Its application extends to projects, where it plays a crucial role in ensuring alignment with company objectives and facilitating the determination of metrics that truly matter to the quality and success of the project.

Ø  What does it mean to Define Performance Standard? A performance standard defines:

·       The process to be measured

·       How it will be measured

·       How much variance will be tolerated.

This is the point when you determine the best way to turn what the customer wants into a numeric measurement.

Ø  Why is it important to Define Performance Standard?

The performance standard translates customer needs into a precisely defined measure, enabling the collection of performance data. By establishing clear criteria for acceptable and unacceptable performance in your process, you can then define a defect. This definition of a defect serves as the foundation for evaluating performance capability and setting improvement goals for the project.

Ø  The Key Steps in “Define Performance Standards” are:

·       Develop the Operational Definition

·       Define Unit

·       Define Opportunity

·       Identify the Target

·       Identify Specification Limits

·       Define a Defect / Defective

·       DPU /DPMO

Stay tuned for Article number 16, where we will comprehensively define the Operational Definition within the context of Define Performance Standards.

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