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Lecture Operations management: Chapter 10 - William J. Stevenson

Chapter 10 - Quality control. In this chapter, you will learn to: Explain the need for quality control, discuss the basic issues of inspection, list and briefly explain the elements of the control process, explain how control charts are used to monitor a process, and the concepts that underlie their use,. | Quality Control Chapter 10 Copyright © 2015 McGraw-Hill Education. All rights reserved. No reproduction or distribution without the prior written consent of McGraw-Hill Education. You should be able to: LO 10.1 Explain the need for quality control LO 10.2 Discuss the basic issues of inspection LO 10.3 List and briefly explain the elements of the control process LO 10.4 Explain how control charts are used to monitor a process, and the concepts that underlie their use LO 10.5 Use and interpret control charts LO 10.6 Perform run tests to check for nonrandomness in process output LO 10.7 Assess process capability Chapter 10: Learning Objectives What is Quality Control? Quality Control A process that evaluates output relative to a standard and takes corrective action when output doesn’t meet standards If results are acceptable no further action is required Unacceptable results call for correction action Inspection alone is not is generally not sufficient to achieve a reasonable level of . | Quality Control Chapter 10 Copyright © 2015 McGraw-Hill Education. All rights reserved. No reproduction or distribution without the prior written consent of McGraw-Hill Education. You should be able to: LO 10.1 Explain the need for quality control LO 10.2 Discuss the basic issues of inspection LO 10.3 List and briefly explain the elements of the control process LO 10.4 Explain how control charts are used to monitor a process, and the concepts that underlie their use LO 10.5 Use and interpret control charts LO 10.6 Perform run tests to check for nonrandomness in process output LO 10.7 Assess process capability Chapter 10: Learning Objectives What is Quality Control? Quality Control A process that evaluates output relative to a standard and takes corrective action when output doesn’t meet standards If results are acceptable no further action is required Unacceptable results call for correction action Inspection alone is not is generally not sufficient to achieve a reasonable level of quality Most organization rely upon some inspection and a great deal of process control to achieve an acceptable level of quality. LO 10.1 Inspection An appraisal activity that compares goods or services to a standard Inspection issues: How much to inspect and how often At what points in the process to inspect Whether to inspect in a centralized or on-site location Whether to inspect attributes or variables Inspection LO 10.2 Sampling and corrective action are only a part of the control process Steps required for effective control: Define: What is to be controlled? Measure: How will measurement be accomplished? Compare: There must be a standard of comparison Evaluate: Establish a definition of out of control Correct: Uncover the cause of nonrandom variability and fix it Monitor: Verify that the problem has been eliminated Control Process LO 10.3 Control Chart A time ordered plot of representative sample statistics obtained from an ongoing process (e.g. sample means), used to distinguish