Run Charts are a useful way to tell and communicate your data story to key stakeholders throughout your QI project. Use this guide to interpret your data and determine if your change ideas are resulting in non-random variation (that is, whether or not your change ideas are having an impact on your system) The 4 Run Chart Rules your should be looking for when interpreting your data are ‘Shifts’, ‘Trends’, ‘Astronomical Values’ and ‘Too Many/Too Few Runs.’ The presence of any of these rules indicates that non-random variation is present in your system