Definitive Guide to SPC Charts 

Discover the most popular quality control charts and how to use them.

What is an SPC Chart?

For manufacturers who use statistical process control (SPC) or continuous process improvement, SPC control charts are typically the first indication that something can be improved and warrants a root-cause analysis or other process improvement investigation.

Why Use Control Charts?

A Key Tool for Quality Control

Today, SPC charts are a key tool for quality control and figure prominently in Lean manufacturing and Six Sigma efforts.

The Right Control Chart for Every Situation

In InfinityQS software, you get access to more than 300 SPC chart types. Selecting the most appropriate chart for a given situation can be overwhelming. But using the best control chart for detecting the right type of variation is critical for improving processes and reducing defects.

Plus, unless you also take advantage of additional analytical SPC charts and graphs, you might be missing out on potential insights.

Fortunately, our software solutions automate and simplify chart use to help you get actionable information from your quality data.

The Right SPC Control Charts for Every Situation

SPC Charts Explained

On these pages, you’ll find some basic examples of the most popular SPC control charts and other analytical charts that can optimize your SPC insights. And you’ll get information about how and when to utilize each chart.

For even more detailed information, download our free resource, A Practical Guide to Selecting the Right Control Chart.

SPC Chart Tools for Greater Analysis

Beyond the SPC Chart: See the Benefits of Modern SPC Software

Today’s manufacturing environments produce an ever-increasing amount of data. With support for automated and semi-automated data collection, using statistical process control through SPC-based Quality Intelligence software makes sense and can help reduce or eliminate the potential for human error.

Think you can’t afford to automate SPC charts?

With InfinityQS, implementing SPC software has never been easier—or more affordable.

  What ROI can we expect from SPC software

SPC Control Charts

Select an SPC control chart to learn more about its use in traditional and special production situations.

Individual X and Moving Range (IX-MR) Chart

Individual X and Moving Range (IX-MR) Chart

Charts the actual reading and the absolute difference between two consecutive plot points.


Xbar and Range Chart

Xbar and Range Chart

Plots the average of individual values in a subgroup.

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Xbar and s Chart

Xbar and s Chart

Plots the average and the sample standard deviation of individual values in a subgroup.

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SPC Analytic Charts

Select an analytic chart to discover how it can provide insight for your SPC initiatives.
Histogram Chart


Plots distributions to provide a quick view of variations with a process.

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Pareto Chart


Provides a different way to visualize distributions and analyze problem or cause frequency.

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Box and Whisker Chart


Shows the shape of a distribution, including central value and variability.

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Capability / Performance Chart

Capability & Performance

Capability (Cp) and performance (Cpk) charts illustrate a process’s ability to meet specifications.

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