Yield and quality control

Which of the seven QC tools is the approach of dividing data into groups, such as by machine, operator or material, and comparing them to find the causes of differences?

  1. ASix Sigma
  2. BStratification
  3. CPDCA
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Answer: B. Stratification

Stratification compares data divided by the conditions under which they arose (machine, operator, material lot, time of day and so on). It helps find that a difference invisible in the whole is concentrated in a particular group.

  • A. Six Sigma is a quality improvement program for reducing variation.
  • B. Correct. It divides data into groups for comparison.
  • C. PDCA is a cycle for carrying out improvement.
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More Yield and quality control questions

  1. Which of the seven QC tools is a pre-prepared table of items to check that makes it easy to record and tally inspection results and defect occurrences?
  2. Which is the general explanation of the difference between a product's "quality" and its "reliability"?
  3. What is the approach called that emphasizes, when a problem occurs, going to the actual place, looking at the actual thing and confirming the actual situation?
  4. Which technique varies several process conditions (temperature, time, gas flow and so on) simultaneously and systematically to efficiently determine each factor's effect with few experiments?
  5. What is the system called that monitors equipment sensor data (temperature, pressure, power and so on) during processing, detects unusual states and flags abnormalities early?