When using control charts to optimize process performance, interpreting the data is key. I assess the stability and capability of the process by identifying any out-of-control signals, ...

To create a control chart, you need to collect data on your process variable over a period of time, such as days, weeks, or months. You can use any method that suits your data collection and ...

How to Use Microsoft Excel to Draw Control Charts and Graphs. A control chart plots measured values along with upper and lower quality control limits.

Control charts usually present a graphic display of process stability and/or instability with time, from which the you can determine mean and standard deviation. Types of Control Charts ...

In this example, a manager is using a control chart to measure the average time to answer a customer question on a helpline. The manager collected about 20 samples of call times (three calls an hour).