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