PDSA Cycles


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What is it?

PDSA stands for

Plan
Do
Study
Act

PDSA cycles make up the ‘doing part’ of The Model for Improvement. They are a method of testing out change ideas on a small scale. Each PDSA should be one small scale experiment where you test out a change idea. You then use the learning from the previous test to inform the next.

Why use it?

Having a structure for testing changes can increases the chances for success. It helps people to work through tests in a methodical, organised way and helps prevent people from skipping vital steps.

How to use it?

There are a number of templates available that can help you to document your PDSA cycles. They vary slightly, but all of them will have plan, do, study and act sections.

Plan:

  • What is the objective of this PDSA

  • What is your prediction of what will happen?

  • What steps/tasks need to happen to set this PDSA up?

Do:

  • Describe what happened when you ran the test

Study:

  • How did the outcome compare to your prediction?

  • Did anything go wrong?

  • Did anything go really well?

  • What did you learn?

Act:

You can either:

  • Adapt – make some changes and try again

  • Adopt – no changes are necessary; the change can be adopted as it is

  • Abandon – the test was a disaster and the change is no longer an option

In most situations, you will be adapting. What can you do different next time?

Each PDSA should feed into the next. Once you have completed one cycle, use the learning to inform the next one.

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Pitfalls:

  • Avoid plan – do, plan – do, plan – do. Make sure you work through each of the steps to get the most out of your PDSA

  • Only test one change at a time. If you make multiple changes in one PDSA cycle, you may not know which change worked (or didn’t work)

  • Do your PDSA as a team! QI should not be a solo sport, get the whole team involved

  • Don’t adopt a change too early. Only implement a change when you’re confident that you have done enough testing

More information

Quality Improvement Zone NES - click for a different way of explaining how to use PDSA cycles as well as blank and example templates.

IHI - click for more information explaining what PDSA cycles are.

NHS England – click for a different explanation of PDSA cycles


Want to know more about PDSA cycles? Want some help implementing your own?

Contact the team