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Quality Control and Process Optimization Flashcards

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

Read the first 7 Quality Control and Process Optimization flashcards as text

  1. A plant implements poka-yoke on an assembly line. What is the primary goal of this approach?

    Answer: Prevent defects by making errors impossible or immediately detectable

    Poka-yoke (mistake-proofing) designs processes or fixtures so that errors either cannot occur or are detected immediately when they do.

  2. In process optimization, what is the difference between efficiency and effectiveness?

    Answer: Efficiency is doing things right; effectiveness is doing the right things

    Efficiency measures how well resources are used (output per input), while effectiveness measures whether the right outcomes are being achieved.

  3. Which of the following best describes a Type II error in acceptance sampling?

    Answer: Accepting a bad lot (consumer's risk)

    A Type II error in sampling occurs when a defective lot is accepted, representing the consumer's risk or beta risk.

  4. A plant manager wants to reduce changeover time using SMED. What does SMED stand for?

    Answer: Single-Minute Exchange of Die

    SMED (Single-Minute Exchange of Die) is a lean methodology targeting changeover times of less than 10 minutes to increase flexibility.

  5. What is the purpose of the control phase in a Six Sigma DMAIC project?

    Answer: To sustain improvements and prevent regression to old performance levels

    The Control phase implements monitoring systems, control plans, and standardized procedures to maintain gains achieved in the Improve phase.

  6. When applying Design of Experiments (DOE) in process optimization, what is a 'main effect'?

    Answer: The average change in output when a factor shifts from low to high level

    A main effect is the average response change attributable to changing a single factor from its low to its high level, independent of other factors.

  7. A process produces 45 defects per million opportunities. What sigma level does this approximately correspond to?

    Answer: Five sigma

    Approximately 233 DPMO corresponds to 5 sigma; 45 DPMO is between 5 and 6 sigma, closest to 5 sigma in standard tables.