Six Sigma Green Belt Certification Practice Exam

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Prepare for the Six Sigma Green Belt Certification Exam with comprehensive materials, flashcards, and multiple choice questions. Each question includes expert hints and explanations to solidify your knowledge. Get ready to succeed in your certification journey!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

Which of the following is NOT a process performance index?

The correct answer is: Cpk

The correct choice is that Cpk is indeed a process performance index. The focus of the question is on identifying what is not classified as such among the provided options. Pp, Ppk, and Cpm are all statistical measures that provide insights into how well a process is performing or meeting specifications under varying conditions. Pp (Process Potential) assesses how capable a process could be if it were centered on the target specification, representing the overall spread of the process. Ppk (Process Performance Index) adjusts for the effect of centering, providing a clearer picture of how consistently a process meets specifications. Cpm (Scaled Process Performance Index) additionally considers the target value, which also emphasizes the importance of being centered on target for an optimal process performance. Therefore, all the other options are recognized as process performance indices, each serving a distinct role in evaluating process capability.