Control charts are statistically based graphical tools used to monitor the behavior of a process. Walter A. Shewhart developed them in the mid-1920s while working at Bell Laboratories. More than 80 years later, control charts continue to serve as the foundation for statistical quality control.rnThe graphical and statistical nature of control charts helps us:rn1. Quantify the variation of a process.rn2. Center a process.rn3. Monitor a process in real time.rn4. Determine whether to take action on a process.
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机译：控制图是基于统计的图形工具，用于监视流程的行为。 Walter A. Shewhart在1920年代中期在贝尔实验室工作时开发了它们。 80多年后，控制图继续作为统计质量控制的基础。rn控制图的图形和统计性质对我们有帮助：rn1。量化过程的变化。将进程居中。rn3。实时监视进程。rn4。确定是否对流程采取措施。
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