Various tests can help determine when an out-of-control event has occurred.
Common cause variation, which is intrinsic to the process and will always be present.A control chart helps one record data and lets you see when an unusual event, such as a very high or low observation compared with 'typical' process performance, occurs.Ĭontrol charts attempt to distinguish between two types of process variation: Statistical process control is often used interchangeably with statistical quality control (SQC).Ī popular SPC tool is the control chart, originally developed by Walter Shewhart in the early 1920s. SPC tools and procedures can help you monitor process behavior, discover issues in internal systems, and find solutions for production issues. Statistical process control (SPC) is defined as the use of statistical techniques to control a process or production method.
Quality Glossary Definition: Statistical process control
