Adding summary icons to charts

[nickkrollnhs]

Please can the MDC summary icons be added to the SPC charts. Icons can be downloaded,

• as PNG files here: https://github.com/nhsengland/making-data-count/tree/main/Icons
• SVG versions used in R package https://github.com/nhs-r-community/NHSRplotthedots/tree/main/inst/icons from this update update icons nhs-r-community/NHSRplotthedots#163

Variation icon:

The first icon represents the observed variation in the latest data point - regardless of what rule has been broken.

Common cause variation

1. IF latest data point is common cause variation THEN VariationIconCommonCause.png
   Special cause improvement
2. IF latest data point is special cause improvement high point THEN VariationIconImprovementHigh.png
3. IF latest data point is special cause improvement low point THEN VariationIconImprovementlow.png
   Special cause concern
4. IF latest data point is special cause concern high point THEN VariationIconconcernHigh.png
5. IF latest data point is special cause concern low point THEN VariationIconImprovementlow.png

Assurance icon

The second icon represents the assurance of the process, and how likely this process will hit the target in the future. The 3 sigma control limits should be used for the LPL and UPL calculations.

1. IF improvement direction = High THEN:
   IF target >=UPL line THEN AssuranceIconFail.png
   IF target < UPL AND > LPL THEN AssuranceIconHitOrMiss.png
   IF target <= LPL THEN AssuranceIconpass.png

2. IF improvement direction = low THEN:
   IF target<= LPL line THEN AssuranceIconFail.png
   IF target < UPL AND > LPL THEN AssuranceIconHitOrMiss.png
   IF target >= UPL THEN AssuranceIconpass.png

Please can the icons be made visible in the top right hand corner of the SPC chart.

Many thanks,
Nick Kroll

[andrjohns]

Closed by #156 and #146