Control Chart Types

How Many Types of Control Charts Are There?

There are two main categories of control charts:

  1. Variable control charts for measured data.
  2. Attribute control charts for counted data.

Within these two categories there are seven standard types of control charts. These are often refered to as Shewhart control charts because they were invented by Walter A. Shewhart who worked for Bell Labs in the 1920s.

seven types of control charts

Why are there so many types of control charts? What makes them different?

scared young man

Each control chart uses a different formula to account for three characteristics of the underlying data:

  1. The type of data (measured or counted)
  2. How measurements are grouped or what is counted
  3. The sample size

It sounds scary, but its not because...

QI Macros SPC Add-in for Excel:

Will make the calculations for you. You don't need to learn any formulas.

Will analyze your data and select the right chart for you. You don't need to memorize rules or get lost in a forest of decision trees.

young guy thumbs up

QI Macros Draws All Seven of the Shewhart Control Charts

Shewhart Variable Control Charts

Use for Measured Data

(time, money, length, width, depth, weight, etc.)
Often contains decimals (.006, 8.9, 74.05)
Shewhart Attribute Control Charts

Use for Counted Data

(number of defects, mistakes, errors, etc.)
Always a whole number (1, 44, 75)

It is so simple to use and anybody can use it. It's like a magic program.

You input the data, you click the button and, "poof," there it is!
It's all done for you. It's great, I love it...

- National Association of Healthcare Quality Conference

QI Macros Draws These Specialized Control Charts Too

Learn More...

More Reasons to Choose QI Macros



  • Only $299 USD - less with quantity discounts
  • No annual subscription fees
  • Free technical support

easy to use

Easy to Use

  • Works right in Excel
  • Create a chart in seconds
  • Easy to customize & share charts

proven and trusted

Proven and Trusted

  • More than 100,000 users
  • In More than 80 countries
  • Five Star CNET Rating - Virus free