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QuEST Mental Health Data for Improvement Network. SPC Charts Alison Redpath Senior Information Analyst. Statistical Process Control ( SPC ). Run Chart vs SPC. Which chart?. What type of data?. Discrete. Continuous. Can both occurrences and non-occurrences be counted?. How many

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Quest mental health data for improvement network

QuEST Mental Health Data for Improvement Network

SPC Charts

Alison Redpath

Senior Information Analyst




Which chart
Which chart?

What type

of data?

Discrete

Continuous

Can both occurrences and non-occurrences be counted?

How many

observations

per sub-group?

No

Yes

Are there equal areas of opportunity?

Are the sub-groups equal size?

2-10

1

No

>10

Yes

XbarR chart

XmR chart

No

Yes

p-chart

XbarS chart

np-chart

c-chart

u-chart


Which chart1
Which chart?

What type

of data?

Measure

Count

Do we have both pass/fail, yes/no?

How manyare represented by one data point?

No

Yes

Is the chance the same for each point?

Do all data points represent the same number?

2-10

1

Yes

>10

No

No

Yes

XbarR chart

XmR chart

p-chart

XbarS chart

c-chart

np-chart

u-chart


Mental health likely charts
Mental Health likely charts

Waiting times breachers per month % p-chart

DNA % - p-chart

New:follow-up ratio per month p-chart

Number of referrals per month c-chart

Number of patients on the caseload per month c-chart

Total waiting list size c-chart

Average waiting time per month XbarR chart

Average waiting time per day XbarS chart

Waiting time per patient XmRchart



Equations
Equations

https://www.moresteam.com/toolbox/statistical-process-control-spc.cfm



Rules for interpretation
Rules for interpretation

Any point outside the control limits

2/3 points in the outer third

15 consecutive points in the inner third

8 or more above or below the average

6 or more in a trend


Example
Example

Number of Adult Psychiatry Appointments DNA'd in NHS Somewhere between January 2011 and January 2013



Further information
Further information

http://en.wikipedia.org/wiki/Control_chart has a list of different control chart types, with links to how to construct each of them

Register with IHI.org and then find the webex On Demand: Using Run and Control Charts to Understand Variation


Further support
Further support

Alison Redpath

Senior Information Analyst

QuEST Mental Health

01312443284

[email protected]


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