statistical quality control chart

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• Quality control — This article is about the project management process. For other uses, see Quality control (disambiguation). Maintenance check of electronic equipment on a U.S. Navy aircraft …   Wikipedia

• Control chart — One of the Seven Basic Tools of Quality First described by Walter A. Shewhart …   Wikipedia

• Statistical process control — (SPC) is an effective method of monitoring a process through the use of control charts. Control charts enable the use of objective criteria for distinguishing background variation from events of significance based on statistical techniques. Much… …   Wikipedia

• Shewhart individuals control chart — Individuals and moving range control chart Originally proposed by Walter A. Shewhart Process observations Rational subgroup size n = 1 Measurement type Average quality characteristic per unit Quality characteristic type …   Wikipedia

• Statistical Process Control — Die statistische Prozesslenkung (auch statistische Prozessregelung oder statistische Prozesssteuerung, engl. statistical process control, SPC genannt) wird üblicherweise als eine Vorgehensweise zur Optimierung von Produktions und… …   Deutsch Wikipedia

• quality control — The activities and techniques used to achieve and maintain a high standard of quality in a transformation process. They may include systematic inspection of inputs and outputs, or a sample of inputs and outputs at various stages in their… …   Big dictionary of business and management

• control chart — /kənˈtroʊl tʃat/ (say kuhn trohl chaht) noun a statistical chart on which observations are plotted as ordinates in the order in which they are obtained, and on which control lines are constructed to indicate whether the population from which the… …  

• Laboratory quality control — is designed to detect, reduce, and correct deficiencies in a laboratory s internal analytical process prior to the release of patient results and improve the quality of the results reported by the laboratory. Quality control is a measure of… …   Wikipedia

• Quality assurance — Quality assurance, or QA for short, refers to planned and systematic production processes that provide confidence in a product s suitability for its intended purpose. It is a set of activities intended to ensure that products (goods and/or… …   Wikipedia

• Control limits — Control limits, also known as natural process limits, are horizontal lines drawn on a statistical process control chart, usually at a distance of ±3 standard deviations of the plotted statistic from the statistic s mean. Control limits should not …   Wikipedia

• Statistical inference — In statistics, statistical inference is the process of drawing conclusions from data that are subject to random variation, for example, observational errors or sampling variation.[1] More substantially, the terms statistical inference,… …   Wikipedia