GMS 401 Lecture 7: Chapter 7
29 Jul 2016
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Document Summary
Statistical quality control uses statistical techniques & sampling to monitor & test the quality of goods & services. Acceptance sampling determines to accept or reject a product. Statistical process control determines if process is operating within acceptable limits. Inspection is the appraisal of goods/services against standards. The best companies design quality into the process, thereby reducing the need for inspection/tests. Raw materials and purchased parts before a costly operation. On site immovable product (e. g. ship) simple or handheld measuring equipment automated inspection. More favourable test environment: statistical process control. Statistical evaluation of the output of a process during production: the quality control steps, type of variations, control charts, designing control charts. Individual unit and moving range charts: control charts for attributes, using control charts. If outside limits, stop process and take corrective action. Purpose: to monitor process output to distinguish between random and assignable variation. A time ordered plot of sample statistics (e. g. means) obtained from an ongoing process.
