The Certified Quality Engineer Handbook Ch 23 Acceptance

The Certified Quality Engineer Handbook Ch. 23: Acceptance Sampling Dr. Joan Burtner Certified Quality Engineer Associate Professor of Industrial Engineering and Industrial Management

Chapter 23 Overview q Sampling Concepts q Acceptance Sampling Vocabulary q Operating Characteristics (OC) Curve q Sampling Plan Designs Ø Ø Ø Single Sampling Double Sampling Multiple Sampling q ANSI/ASQ Z 1. 4 -2003 Ø Defect Classification Ø Levels of Inspection ISE 428 ETM 528 JMB CH 23 Lecture 2 2 Spring 2016 2

Acceptance Sampling Notes Review q Purpose of acceptance sampling q Mathematical basis for acceptance sampling q Single sampling plan variables: p 1, p 2, alpha, beta, n, c q Specify four variables, deduce the other two (typically n and c) q Sampling plan designs using a nomogram ISE 428 ETM 528 JMB CH 23 Lecture 2 Spring 2016 3 3

ANSI/ASQ Standards q Industry-standard Prescription for Sampling Methods q Defect Classification (page 211) Ø Ø Ø Critical Major Minor q Levels of Inspection Ø Normal Ø Tightened Ø Reduced Ø Special ISE 428 ETM 528 JMB CH 23 Lecture 2 (page 211) 4 Spring 2016 4

ANSI/ASQ Switching Rules q Figure 23. 10 (page 212) Ø Normal to tightened Ø Tightened to normal Ø Normal to reduced q Discontinuation of Inspection 5 ISE 428 ETM 528 JMB CH 23 Lecture 2 Spring 2016 5

CQE Textbook Examples q Example 23. 3 (page 205 -206) Ø Design of double sampling plan Ø Decisions for accept or reject or continue q Example 23. 6 (page 214 -215) Ø Refers to CD-ROM tables Ø Shows results for single, double, and multiple sampling ISE 428 ETM 528 JMB CH 23 Lecture 2 Spring 2016 6 6