Statistical-Process-Control-Charts. The control chart is a graph used to study how a process changes over time. Data are plotted in time order. A control chart always has a central line for the ...

Variable data charts, also known as continuous data charts, are an essential tool in Statistical Process Control (SPC) for monitoring and analyzing continuous or variable data in quality control.

It is essential to monitor the effectiveness of any service redesign on the process of care. Interpretation of process changes is complicated by natural or “common cause” variation.1 Classic ...

Statistical Process Control (SPC) is the use of statistical tools and techniques to analyze a process or its outputs to control, manage, and improve the quality of the output or the capability of the ...

Statistical process control charts have been in use for nearly 100 years. These charts are powerful tools, but it can be confusing to determine the appropriate data collection parameters.

Control limits, or natural process limits, are horizontal lines drawn on a statistical process control chart. The limits are drawn at a distance of ±3 standard deviations of the plotted statistic from ...

Fuzzy control charts represent a significant evolution in Statistical Process Control (SPC) by addressing intrinsic uncertainties in measurement and human evaluation that classical approaches ...

Control charts for monitoring relative risk rate in the presence of Weibull competing risks with censored and masked data; Copula-based multivariate EWMA control charts for monitoring the mean vector ...