What is Control Charts?

Control charts, also known as Shewhart charts, are a statistical process control tool used to monitor and control a process by visually displaying data points collected over time. The chart includes a center line (representing the average), an upper control limit (UCL), and a lower control limit (LCL). By observing whether data points fall within the control limits and identifying any trends or patterns, users can determine if a process is in statistical control or if corrective action is needed to address special cause variation.