X Median R Charts in Excel

Use an X Median R Chart to Evaluate Stability of Processes Using Variable Data

The XMedianR chart works just like the X bar R chart except that it uses the median instead of the average as a measure of central tendency.

Here is an example of an X Median R Chart created using QI Macros for Excel.

X Median R chart created in Excel by QI Macros

The X Median R chart can help you evaluate the cycle time for almost any process: making a widget, answering a customer call, seating a customer, delivering a pizza, or servicing an appliance. This chart is especially useful when you do this many times a day. Collecting the data could be expensive if you measured every time you did it. Using a small sample (typically five), however, you can effectively measure and evaluate the process.

Calculate, plot, and evaluate the range chart first. If it is "out of control," so is the process. If the range chart looks okay, then calculate, plot, and evaluate the X chart.

Learn More...


Why Choose QI Macros Over Other Control Chart Software?

affordable

Affordable

  • Only $249 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

  • 100,000 users in 80 countries
  • Celebrating 20th Anniversary
  • Five Star CNET Rating - Virus free