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23-Ind-A5 Quality Planning, Control, and Assurance: May 2015

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

  1. Question 1 Definitions of Quality, Six Sigma, Quality Certification, and Concurrent Engineering
  2. Question 2 Variation, $\bar X$/$R$ Control Charts, Fraction Nonconforming, and Shift Detection
  3. Question 3 Confidence Intervals vs. Natural Tolerance Limits, and Process Capability Indices
  4. Question 4 Attribute Control Charts and a $u$-Chart for Disk-Drive Assembly Nonconformities
  5. Question 5 Taguchi Methods, and a $2^3$ Factorial Experiment on Tensile Strength
  6. Question 6 Acceptance Sampling, MIL-STD-105E, and a Single Sampling Plan

Start with Question 1 →

National Exams — May 2015 — 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.