New To Quality or Need A Refresher? Let ASQ's Quality Resources Help. Our Topic for This Week is the Histogram.

A frequency distribution shows how often each different value in a set of data occurs. A histogram is the most commonly used graph to show frequency distributions. It looks very much like a bar chart, but there are important differences between them. This helpful data collection and analysis tool is considered one of the seven basic quality tools.
Use a histogram when:
  • The data are numerical
  • You want to see the shape of the data’s distribution, especially when determining whether the output of a process is distributed approximately normally
  • Analyzing whether a process can meet the customer’s requirements
  • Analyzing what the output from a supplier’s process looks like
  • Seeing whether a process change has occurred from one time period to another
  • Determining whether the outputs of two or more processes are different
  • You wish to communicate the distribution of data quickly and easily to others
Learn more at:

*A Histogram template is available at:
News Quality Management Division 05/07/2022 3:55pm CDT


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