quality control

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Quality Control

The processes a company or organization uses to test products to ensure that they are not defective. Quality control operatives may investigate the procedures used to make a product, the knowledge of employees or even intangibles like company morale. Quality control is distinguished from quality assurance in that quality control tests for errors while quality assurance seeks to put in place systems to ensure that the errors do not happen in the first place. See also: Quality.

quality control

the task of ensuring that the QUALITY of a product or service meets specified performance criteria. Quality control involves a number of activities, in particular:
  1. interpretation of PRODUCT SPECIFICATIONS;
  2. INSPECTION of products at each stage of production, including SAMPLING procedures to select items for testing and the use of testing equipment to check the performance of components or products and detect those that are defective. The results of such tests enable production operations to be modified quickly, for example by changing machine settings, to prevent further defectives being made and thereby saving on rectification costs or the later processing costs of items which would eventually have to be scrapped;
  3. cooperation with design, marketing, production and research and development over improvements in product quality;
  4. undertaking periodic quality audits to review the effectiveness of quality control procedures. See TOTAL QUALITY MANAGEMENT, PRODUCTION CONTROL, QUALITY ASSURANCE, FISHBONE CHART, QUALITY CIRCLE, SCRAP, CONTROL CHART, FAILURE COSTS, NORMAL CURVE, SAMPLING, ACCEPTANCE SAMPLING, CONTROL COSTS, LOT TOLERANCE PERCENTAGE DEFECTIVE, QUALITY FUNCTION DEPLOYMENT, QUALITY LOSS FUNCTION.

quality control

a discipline concerned with improving the QUALITY of goods and services produced. The object of quality control is to prevent faulty components or finished goods from being produced, and it uses a variety of devices to help achieve this aim. Techniques of statistical sampling and testing can be used to identify faulty materials and products. Statistical variability limits can be used to ensure, for example, that machines are continuing to hold their tolerances in producing goods. QUALITY CIRCLES can be employed to involve work-groups in the task of quality assurance by generating discussion about the cause of quality problems and how workers themselves can deal with such problems. See also PRODUCTIVITY, PRODUCT PERFORMANCE, PRODUCT DIFFERENTIATION.
References in periodicals archive ?
Small firms in particular sometimes need outside help before taking on certain clients--such as those outside their usual area of expertise--and in ensuring their audit quality-control system is strong.
The proposed SSTS indicated that the nature, extent, and formality of a firm's tax quality-control policies and procedures should be appropriately comprehensive and suitably designed in relation to the firm's size, the number of its offices, the degree of authority allowed its personnel and its offices, the knowledge and experience of its personnel, the nature and complexity of the firm's practice, and, most importantly, with appropriate cost/benefit considerations (from the introduction of Proposed SSTS No.
ISGN offers lenders further quality-control savings with its highly skilled global facilities, providing around-the-clock services that can highlight quality-control results before the next business day.
While many quality-control procedures performed at the coating mixing station are similar for large or small foundries, distribution system controls can be different for the many types of distribution systems possible.
Recent developments in clinical quality control have focused attention on using quality-control systems designed to detect clinically significant changes in the measurement system (5, 6).
Westgard used these maximum systematic and random errors and the power function diagrams to construct quality-control selection grids [8].
The registration process begins with an examination of the company's prevailing quality-management practices and quality-control objectives in the context of the ISO framework.
The new unit's software package allows users to perform comprehensive color formulation prediction and correction, advanced quality-control inspection, and statistical analysis.
These instruments make spectrophotometric quality-control measurements possible on the production floor, in locations normally inaccessible to performing color measurement.
PEICO), having provided professional engineering services for Lennar's Florida division over the past 12 years, including geotechnical, construction materials testing, structural design and quality-control inspection services, has now contracted to provide professional engineering services to U.
MAS(TM)), with headquarters in Camarillo, is a leading provider of quality-control products, quality- assurance programs and services, reagents and calibrators used in clinical diagnostic testing worldwide.
This includes testing documentation and sophisticated, embedded quality-control capabilities unique among POC testing devices.

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