Control Chart

Control ChartA 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


Further Reading

More Information

Icon McCoy and Riley: Basics of the Control Chart (PDF: 220KB / 8 pages)
Icon American Society for Quality: Control Chart
Icon Hanslik, Boelle, and Flahault: The Control Chart: An Epidemiological Tool for Public Health Monitoring
Icon McCoy: Finding the Right Tool for your Purpose (PDF: 466KB / 40 pages)

Examples of Control Charts

Icon Woodall: The Use of Control Charts in Health-Care and Public-Health Surveillance (PDF: 316KB / 16 pages)
Icon Mohammed, Worthington, and Woodall: Plotting Basic Control Charts: Tutorial Notes for Healthcare Practitioners (PDF: 663KB / 9 pages)