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23-Ind-A5 Quality Planning, Control, and Assurance: May 2018

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

  1. Question 1 Quality Philosophy, Six Sigma/TQM, Certification, and Concurrent Engineering
  2. Question 2 SPC Tools, X̄/S Control Charts, Fraction Nonconforming, and ARL
  3. Question 3 Process Capability — Non-normal Data, $C_p/C_{pk}/C_{pm}$, and Fraction Nonconforming
  4. Question 4 Attributes Charts — p vs. u, the c Chart's Inspection Unit, and a u Chart Build
  5. Question 5 Robust Design, and a $2^3$ Factorial Experiment on Tensile Strength
  6. Question 6 Acceptance Sampling — AQL/LTPD/AOQL, Sequential Sampling, and MIL-STD-105E

Start with Question 1 →

National Exams, May 2018. 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 MIL-STD-105E Tables 1 and II-A) 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/TQM, ISO 9000), Ch. 4–6 (magnificent seven SPC tools, process capability, X̄-S and attributes control charts), Ch. 9 (average run length), Ch. 13–14 (designed experiments/factorial designs, acceptance sampling and MIL-STD-105E).