g Chart in Excel

Use g Charts to analyze the time or units BETWEEN rare events.

The g Chart is used to evaluate process stability when analyzing the time or procedures BETWEEN rare events. For example, never events in healthcare such as retained foreign objects during surgery (you could use days or surgeries between events).

g chart excel


QI Macros add-in for Excel makes it easy to create a g Chart

  1. Just click and drag over the data to select it.
  2. Then click on the QI Macros menu > Control Charts (SPC) > Attribute (c,np,p,u,g,t), and then select g Chart:
  3. attribute control chart menu

  4. QI Macros will do all the math and draw the chart for you. QI Macros will also turn any unstable points or conditions on the g Chart red. These should be investigated.

QI Macros also provides g Chart sample data which can be accessed from the QI Macros Help menu in Excel.

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