mr: Moving Range of Individual Measurements

Moving Range (MR) charts plot the size of the difference between successive observations. These are used for monitoring the amount of timepoint-to-timepoint variability and are often interpreted in combination with an i-Chart.

The width of these limits is determined by the magnitude of difference between each successive observation.

The chart below is utilising a feature of the custom visual - when both a numerator and denominator is supplied to the run, i, i_m, i_mm or mr charts, the ratio of the two will be used as the outcome.

To construct this chart, you provide the numerator of interest in the ‘Outcome/Numerator’ field, the denominator of interest in the ‘Denominator’ field, and the date variable (Month) in the ‘ID Key’ field (depicted below). Then, select mr - Moving Range of Individual Measurements from the Chart Type drop-down in Data Settings.