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23-Ind-A5 Quality Planning, Control, and Assurance: December 2016

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

  1. Question 1 Taguchi Philosophy, Cost of Quality, Supplier Certification, and Six Sigma
  2. Question 2 Attribute vs. Variable Control Charts and an $\bar X$–$R$ Chart with Two-Point ARL Design
  3. Question 3 Tolerance Limits, Process Capability, and Fraction Nonconforming from $C_p$, $C_{pk}$
  4. Question 4 Zone Rules and ARL, and an Individuals/Moving-Range Chart with Detection Speed
  5. Question 5 Attribute Charts, a $p$ Chart, and Detection Speed after a Proportion Shift
  6. Question 6 Acceptance Sampling Concepts and a MIL-STD-105E Single Sampling Plan

Start with Question 1 →

National Exams, December 2016. 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, MIL-STD-105E sample-size code letters and master sampling table, control-chart factors for variables) are attached to the paper and applied directly.

Reference texts: Montgomery, Introduction to Statistical Quality Control (8th ed.) — Ch. 1 (quality philosophy, Taguchi loss function, cost of quality), Ch. 5–6 (variables control charts, including individuals/moving-range charts), Ch. 7 (attributes charts and average run length), Ch. 8 (process and measurement-system capability, natural tolerance limits), Ch. 15 (acceptance sampling by attributes, MIL-STD-105E and Dodge–Romig plans), Ch. 16 (Six Sigma/DMAIC).