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QuEST Mental Health Data for Improvement Network
Run ChartsAlison PickeringSenior Information Analyst
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By the end of this session you will…
• know why we use run charts in improvement work
• be able to construct a run chart• understand how to read the run chart• know when to change the median• know how to find further support
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Why Run Charts?
“Data have no meaning apart from their context”
W. Shewhart
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Worked example
• NHS Somewhere was having trouble with their DNA rate, so they implemented a text reminder system in July 2011. Did it work?
MonthNumber of
DNAsJan-11 9Jan-12 6Jan-13 4
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Monthly data
Month Number of DNAsJan-11 9Feb-11 8Mar-11 9Apr-11 6May-11 7Jun-11 5Jul-11 6Aug-11 8Sep-11 9Oct-11 6Nov-11 7Dec-11 6Jan-12 6Feb-12 7Mar-12 9Apr-12 9May-12 8Jun-12 6Jul-12 7Aug-12 8Sep-12 6Oct-12 8Nov-12 7Dec-12 5Jan-13 4
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Create a line chart
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Find your median
Month Number of DNAsJan-13 4Jun-11 5Dec-12 5Apr-11 6Jul-11 6Oct-11 6Dec-11 6Jan-12 6Jun-12 6Sep-12 6May-11 7Nov-11 7Feb-12 7Jul-12 7Nov-12 7Feb-11 8Aug-11 8May-12 8Aug-12 8Oct-12 8Jan-11 9Mar-11 9Sep-11 9Mar-12 9Apr-12 9
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Add the median to your chart
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Add titles and labels
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Annotate chart with process changes
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Run Chart Rules
There are four simple things to look for on a run chart to highlight whether there are significant changes happening:1. A shift2. A trend3. The number of runs4. An astronomical data point
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A shift
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A trend
Total number of data points Number up or down in a row to indicate special cause
5 to 8 5 or more9 to 20 6 or more21 to 100 7 or more
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The number of runs
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The number of runs
Data points
Lower limit
Upper limit
15 4 12
16 5 12
17 5 13
18 6 13
19 6 14
20 6 15
21 7 15
22 7 16
23 8 16
24 8 17
Data points
Lower limit
Upper limit
25 9 17
26 9 18
27 9 19
28 10 19
29 10 20
30 11 20
31 11 21
32 11 22
33 11 22
34 12 23
Data points
Lower limit
Upper limit
35 13 23
36 13 24
37 13 25
38 14 25
39 14 26
40 15 26
41 16 26
42 16 27
43 17 27
44 17 28
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The number of runs
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Astronomical point
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Our example
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Another example
Median = 3.9
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Changing the median
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Changing the median example
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Conclusion
Source: xkcd.com
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Further learning
• Reading:– QI Hub -
www.qihub.scot.nhs.uk/knowledge-centre/quality-improvement-tools/run-chart.aspx
– IHI - www.ihi.org/knowledge/Pages/Tools/RunChart.aspx
– Paper Adobe Acrobat Document
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Further support
Alison PickeringSenior Information Analyst
QuEST Mental Health01312443284