Statistical process control tool

Statistical process control (SPC) is an analytical technique that plots data over time. It helps us understand variation and in so doing guides us to take the most appropriate action.

SPC is a good technique to use when implementing change as it enables you to understand whether changes you are making are resulting in improvement — a key component of the Model for Improvement widely used within the NHS.

SPC is widely used in the NHS to understand whether change results in improvement. This tool provides an easy way for people to track the impact of improvement projects.

This tool will enable you to:

  • record your data on a daily, weekly or monthly basis and plot it on an SPC chart automatically
  • indicate when a process may have changed by automatically applying SPC rules to the data
  • annotate your chart and when appropriate apply step changes to your mean and process limits

Statistical process control tool

If you have any comments or feedback on the tool, please email

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