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Statistical process control (SPC) or statistical quality control (SQC) is the application of statistical methods to monitor and control the quality of a production process. This helps to ensure that the process operates efficiently, producing more specification-conforming products with less waste scrap.
In statistical process control (SPC), the ¯ and R chart is a type of scheme, popularly known as control chart, used to monitor the mean and range of a normally distributed variables simultaneously, when samples are collected at regular intervals from a business or industrial process. [1]
SPC Australia, a brand of jams and tinned goods founded in Shepparton, Victoria, Australia; SPC Group, a Korean food company from Samlip Group; Synthetic Plastics Company, a defunct plastics manufacturer that owned many budget-price record labels; Syrian Petroleum Company, a state-owned oil company
The Western Electric rules are decision rules in statistical process control for detecting out-of-control or non-random conditions on control charts. [1] Locations of the observations relative to the control chart control limits (typically at ±3 standard deviations) and centerline indicate whether the process in question should be investigated for assignable causes.
In some cases, the software's default settings may produce incorrect results; in others, user modifications to the settings could result in incorrect results. Sample data and results are presented by Wheeler for the explicit purpose of testing SPC software. [7] Performing such software validation is generally a good idea with any SPC software.
Model A assumes that SPC term can validly be either zero or negative if 5 years or less have elapsed from filing of the corresponding patent to issuance of the first MA in the EEA. In this event, a positive (and non-zero) SPC term is obtained (after extension) if the time from patent filing to MA issuance is more than 4.5 years.
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A SPC must state that it has a specific purpose to pursue a public purpose that a traditional nonprofit corporation would normally have pursued. Because an SPC is a for-profit organization, they do not qualify for tax-exempt status as a nonprofit corporation.