We've upgraded our old XMR charts and replaced them with new NHS-compliant SPC charts, which should be more familiar to users.
These are currently "in beta test" and will be released to live within a few days.

beta screen shot - section of Board IPR page

The changes are:

  1. Remove Moving Average (MR) Chart
  2. Use NHS Point Colouring Rules
  • If 6 dots or more in a row of continuous improvement, colour blue
  • If 6 dots or more in a row of continuous worsening, colour orange
  • If 6 dots or more in a row are better than the base line mean, colour blue
  • If 6 dots or more in a row are worse than the base line mean, colour orange
  • If none of above criteria is met colour dots grey

3. Use NHS Line Colours

  • Performance line = solid grey
  • Process Limit line = Dashed Grey
  • Target Line = Dashed Red
  • Minor Horizontal Gridlines = Fine width solid grey

4. Change Calculation Rules

  • Always show maximum number of points available up to 60 points (Remove "duration" option).
  • Calculate Mean Line (Baseline) on the first half of points on display.
  • Calculate Average Moving Range on the first half of points on display.
  • Set process limit lines at 2.66 * average moving range

5. Legend Items

  • Mean
  • Process limits
  • Target as set

6. Variation and Assurance Icons

If latest performance point is:

  • coloured orange and high is good = show orange L
  • coloured blue and high is good = show blue H icon
  • coloured orange and low is good = show orange H icon
  • coloured blue and low is good = show blue L icon
  • uncoloured (grey) = show CC icon

If last 6 performance points are:

  • better than target = show P icon
  • worse than target = show F icon
  • a mix of better and worse = show ? icon