The CTQ flowdown serves several purposes. It provides clear project definitions, clarifies the business rationale of an improvement project, makes explicit business assumptions behind project definitions, helps to focus on the vital few real business drivers, and facilitates optimally solving trade-off problems. This article provides a theoretical grounding of the CTQ flowdown, and also provides practitioners with a prescriptive template.
Key words: balanced scorecard, key performance indicators, measurement, project definition, Six Sigma, tree diagram
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