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23-Ind-A5 Quality Planning, Control, and Assurance: December 2013

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

  1. Question 1 TQM, Six Sigma, Supplier Certification, and QFD
  2. Question 2 Pareto vs. Histogram, Trend Processes, and EWMA vs. CUSUM
  3. Question 3 OC Function, an $\bar X$-$R$ Chart for Steel-Beam Tensile Strength, and Chart Design for a 1.2$\sigma$ Shift
  4. Question 4 Stable/Capable Processes, Capability Indices, and Fraction Nonconforming from $C_p$/$C_{pk}$
  5. Question 5 Variables vs. Attributes Charts, and a $u$-Chart for Gas Water Heater Inspection
  6. Question 6 AQL vs. Dodge-Romig Sampling Plans, Sequential Sampling, and a MIL-STD-105E Plan

Start with Question 1 →

National Exams — December 2013 — 98-Ind-A5 Quality Planning, Control and Assurance. Three-hour, closed-book exam; Casio or Sharp approved calculators only; one double-sided 8.5×11 aid sheet permitted; relevant statistical tables attached. Format: six questions, each worth 20 marks; any five constitute a complete paper, and only the first five appearing in the answer book are marked, so candidates effectively choose 5 of 6. All six are solved below for completeness.

Reference texts: Montgomery, Introduction to Statistical Quality Control (8th ed.) — control charts, process capability, acceptance sampling and quality management (the primary text for every part of this paper); ISO 9001:2015 — quality management systems and certification; MIL-STD-105E — sampling procedures and tables for inspection by attributes.