A control chart displays process data by time, along with upper and lower control limits that delineate the expected range of variation for the process. These limits let you know when unusual variability occurs.

Jan 28, 2025 · Since this article describes a plethora of control charts, there are simple questions a practitioner can ask to find the appropriate chart for any given use. Accordingly, figure 13 walks …

Jul 23, 2025 · These charts are used when the data being monitored is continuous. The most common variable control charts include: X-bar Chart: Monitors the mean of a process over time. R-chart: …

See a sample control chart and create your own with the control chart template (Excel). You can also search articles, case studies, and publications for control chart resources. The Quality Toolbox. …

Jun 15, 2023 · In plain English, these charts show relationships between the numbers you’ve collected. This is a sample of a Control Chart: The numbers can be from anything: How many minutes late or …

Guide to what is Control Chart. We explain its types, comparison with run chart and histogram, examples, uses, & disadvantages.

Apr 3, 2025 · Learn how a control chart works in project management with simple types, steps, and real examples from construction to track cost, quality, time, and safety.

Control charts plot sample statistics with ±3 σ control limits, separating common-cause noise from special-cause signals. Early detection prevents tampering, sustains Six Sigma stability, and drives …

Nov 11, 2023 · Control charts are broadly classified based on the type of data: Variable Data (measured) and Attribute Data (counted). Below are the most commonly used control charts:

Control charts are most frequently used for quality improvement and assurance, but they can be applied to almost any situation that involves variation.