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Lean Six Sigma Fundamentals Flashcards

7 cards from real CPP practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Lean Six Sigma Fundamentals flashcards as text

  1. Which control chart is most appropriate for monitoring the proportion of defective items in a process where sample sizes vary?

    Answer: p-chart

    The p-chart monitors the proportion of nonconforming items and is suitable for variable sample sizes, unlike the np-chart which requires constant sample sizes.

  2. In Lean Six Sigma, what does 'COPQ' stand for, and why is it significant?

    Answer: Cost of Poor Quality — quantifies financial losses from defects and inefficiencies

    COPQ (Cost of Poor Quality) captures all costs associated with producing defective products or services, including appraisal, prevention, internal failure, and external failure costs.

  3. What is the main purpose of a 'pilot' in the Improve phase of DMAIC?

    Answer: To test solutions on a small scale before full implementation

    Running a pilot in the Improve phase allows teams to validate that proposed solutions actually deliver the expected improvement before committing to a costly full-scale rollout.

  4. Which Lean concept describes the ideal state where product flows continuously through the value stream without interruption or batch waiting?

    Answer: One-piece flow

    One-piece flow (continuous flow) means processing one unit at a time through each step, eliminating batch-and-queue waiting that increases lead time.

  5. A Six Sigma team discovers that their process mean has shifted by 1.5 sigma from target. According to Six Sigma convention, how is this accounted for in long-term sigma calculations?

    Answer: A 1.5 sigma shift is subtracted from the short-term sigma level to estimate long-term performance

    Six Sigma methodology historically accounts for a 1.5-sigma mean shift between short-term and long-term performance, so long-term sigma = short-term sigma minus 1.5.

  6. Which of the following best describes the concept of 'Poka-Yoke'?

    Answer: An error-proofing mechanism that prevents defects or makes them immediately obvious

    Poka-Yoke (mistake-proofing) uses design features, fixtures, or sensors to prevent errors from occurring or to detect them instantly before they become defects.

  7. When conducting a Measurement System Analysis (MSA), what does a high %GRR value (e.g., >30%) indicate?

    Answer: The measurement system contributes excessive variation relative to process variation

    A %GRR above 30% signals that the measurement system itself introduces too much variation, meaning data collected may be unreliable for decision-making.