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23-Ind-A5 Quality Planning, Control, and Assurance: May 2017

Nivaar worked solution (AI-drafted; not reviewed by a licensed engineer)

  1. Question 1 Quality Philosophy, Concurrent Engineering, and Cost of Quality
  2. Question 2 Process Variation, Run Length, and the X̄-R Control Chart
  3. Question 3 X̄ vs. CUSUM/EWMA, and the X̄-S Control Chart
  4. Question 4 Reliability, the Bathtub Curve, and Weibull Analysis
  5. Question 5 Attributes Control Charts and a u-Chart for Disk-Drive Assemblies
  6. Question 6 Designed Experiments — Randomization, Blocking, and a 2³ Factorial

Start with Question 1 →

National Exams, May 2017. Closed-book examination. Any five of the six questions constitute a complete paper; all six are answered in full below. Relevant statistical tables (cumulative standard normal distribution, factors for constructing variables control charts, the F distribution, and a blank Weibull probability chart) are reproduced/applied from the paper's own attached appendices.

Reference texts: Montgomery, Introduction to Statistical Quality Control (8th ed.) — Ch. 1–2 (quality philosophy, cost of quality, Six Sigma/DMAIC), Ch. 5–6 (variables control charts: X̄-R, X̄-S, process capability), Ch. 7 (attributes charts: p, np, c, u, demerit systems), Ch. 9 (CUSUM and EWMA control charts), Ch. 8 & 13 (reliability, life testing and Weibull analysis; designed experiments and factorial designs).