X bar S Chart Six Pack Template for Excel

Purpose: Evaluate stability of processes using variable data--time, cost, length, weight.

Here is an example of an X bar S (X and S) Chart Template in QI Macros

X and S standard deviation chart capability suite in Excel

The XbarS 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 10 or more), however, you can effectively measure and evaluate the process.

Calculate, plot, and evaluate the standard deviation (S) chart first. If it is "out of control," so is the process. If the S chart looks okay, then calculate, plot, and evaluate the X chart.

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