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23-Ind-A5 Quality Planning, Control, and Assurance: May 2014

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

  1. Question 1 QFD, Taguchi's Design Stages, Sampling vs. Capability, and EVOP
  2. Question 2 SPC Diagrams, Traditional vs. Special Control Charts, and Attributes Charts
  3. Question 3 X̄/S Charts for Sheet-Metal Thickness and Detection-Speed Chart Design
  4. Question 4 Process Capability Indices, Tolerance Limits, and a Hypothesis Test on C p
  5. Question 5 p- vs. np-Charts, a u-Chart for Furniture Scratches, and Chart Design for Fast Detection
  6. Question 6 100% Inspection vs. Acceptance Sampling, MIL-STD-105E, and a Single Sampling Plan

Start with Question 1 →

National Exams — May 2014 — 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 design of experiments for quality improvement (the primary text for every part of this paper); MIL-STD-105E — sampling procedures and tables for inspection by attributes; ISO 9001:2015 — quality management systems and certification.