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UNIT-IV Quality control: Meaning, process control, SQC control charts, single, double and sequential sampling, Introduction to TQM. QUALITY CONTROL DEFINITION OF QUALITY: . The meaning of “Quality” is closely allied to cost and customer needs. “Quality” may simply be detined as fitness for purpose at lowest cost. Y The component is said to possess good quality, if it works well in the equipment for which it is meant. Quality is thus defined as fitness for purpose. © Quality is the “totality of features and characteristics’ both for the products and services that can satisty both the explicit and implicit needs of the customers. © “Quality” of any product is regarded as the degree to which it fulfills the requirements of the customer. * “Quality” means degree of perfection. Quality is not absolute but it can only be judged or realized by comparmg with standards, It can be determined “by some characteristics namely.” design. size, material, chemical composition, mechanical functioning, Workmanship: Tinisti and other propertiés— oo MEANING OF CONTROL Control is a system for measuring and checking (inspecting) a phenomenon, It suggests when to inspect, how often to inspect and how much To inspect. Th Addiffon, it incorporates a fecdback mechanism which explores the causes of poor quality and takes corrective action. Control differs from ‘inspection’, as it ascertains quality characteristics of an item, compares the same with prescribed quality standards and separates defective items from non-defective ones. Inspection, however, does not involve any mechanism to take corrective action. MEANING OF QUALITY CONTROL Quality Control is a systematic contro! of various factors that affect the quality of the product. The various factors include material, tools, machines, type of labour, working conditions, measuring instruments, etc. Quality Control can be defined as the entire collection of activities which ensures that_the operation will produce the optimum Qualit y products at minimum cost. : : As per A.Y-Feigorbaum Total Quality Con ol is: “An effective system for integrating the quality development. Quality maintenance and Quality improvement efforts of the various groups in an organization, so as to enable production and services at the most economical levels which allow full customer satisfaction” : In the words of Alford and Beatly, “Quality Control” may be broadly defined as that “Industrial management technique means of which products of uniform accepted quality are manufactured.” Quality Control is concerned with making things right rather than discovering and rejecting those made wrong. In short, we can say that quality control is a technique of management for achieving required standards of products. “Scanned by CamScanner 
