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 ?
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.
ISGN's quality-control process is dynamic and can be retargeted to cover any new risk elements that emerge, the company said.
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).
The most compelling reason to examine multivariate quality-control charts for monitoring in the clinical setting is the potential correlation structure in laboratory quality-control data.
Westgard used these maximum systematic and random errors and the power function diagrams to construct quality-control selection grids [8].
The laboratorian is more motivated to use the optimized quality-control procedure if it reduces the frequency of quality control.
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.
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.
Michael is an asset to our team because he has participated in a successful QS-9000 audit and registration, a much more demanding quality-control system than CybeRecord's targeted ISO 9001 certification, a necessary qualification to expand our customer base worldwide," said James Lucas, the company's chairman and chief executive officer.
The system will be integrated into their current quality-control procedures for the rescreening of Pap smears.

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