A control chart will help to monitor, control, and improve process performance over time by studying variation and its source. It helps to distinguish special from common causes of variation as a guide to local or management action. A process can be improved to perform consistently and predictably for higher quality, lower cost, and higher effective capacity. There are many types of control charts.
Once a process is selected to be charted, the sampling method and plan are determined. Data is then collected, statistics and control limits are calculated, and the chart is constructed.
See Also: Run Chart
Examples of Control Charts
|Woodall: The Use of Control Charts in Health-Care and Public-Health Surveillance (PDF: 316KB / 16 pages)|
|Mohammed, Worthington, and Woodall: Plotting Basic Control Charts: Tutorial Notes for Healthcare Practitioners (PDF: 663KB / 9 pages)|