quality control


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Related to quality control: Quality management

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 ?
Although the averages of patient clinical chemistry data were originally described for quality control over 30 years ago [18], a series of investigators found that the technique lacked the error-detection capabilities of reference sample quality control.
The VTPR program follows significantly the AICPA Statement on Quality Control Standards #1, System of Quality Control for a CPA Firm.
Each chapter looks at quality control from a slightly different vantage point--ranging from how to start a plan to how often and to whom reports should be sent.
At the same time, nursing staff were learning how to use the computer software program and conduct quality control checks.
Level I laboratories will be required to meet certain "Quality Control Standards," shich will focus on the facility's quality control procedures; the frequency of performance and reporting of quality control measures; requirements for the construction, maintenance, arrangement, and temperature of the physical facility; adequacy of the testing methods and equipment; equipment maintenance and function checks; procedure manuals; labeling of testing supplies; and validation of testing methods.
While continuing to examine selected engagements, the PCAOB also could support the profession's enhancement of its quality control processes and direct audit firms to focus on measuring compliance.
With the WSO, all this is accomplished promptly and efficiently, while thoroughly enhancing productivity and quality control.
The various documents Quality Policy Manual, Quality Control Procedures and any Work Instructions should be prepared on a word processor so that amendments can be incorporated easily.
It is likely that this quality control standard will be considered during the enforcement of those sections.
Promulgating audit, attest and quality control standards for engagements involving nonissuers.
In other Metso news, Metso Automation announced that, since its introduction in September 2003, the order list for its PaperIQ Plus quality control system (QCS) has reached 23.
Stephen Cain, senior environmental planner at the Regional Quality Control Board, said it has requested information about the type of pollutants the projects will add to the stream flow.

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