Root Cause Analysis
Root Cause Analysis (RCA) is a systematic process that attempts to answer three questions about an incident:
- What happened?
- Why did it happen?
- How can we prevent it happening again?
RCA brings together a small team of diverse set of individuals who are independent to the incident.
RCA represents a toolbox of approaches rather than a single method. More than 40 RCA techniques are described in literature, including brainstorming, cause-effect charts, ‘five whys’ diagrams and fault trees. Regardless of these variations, RCAs are organised in sequential steps. The end point of an RCA is a set of recommendations for an organisation to implement to reduce harm to patients in the future.
Aggregating findings from multiple RCAs, other incident investigations and other data sources can be used to identify future risks and proactively develop improvement programs.
Key steps |
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1.Team appointed
Team should be diverse and representative. Team members should not have been involved in the incident.
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2. Initial flow diagram
Aim: to develop a chronological map of what is known and the gaps in knowledge of the incident.
Method: document review and develop questions based on a guide.
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3. Gather information
Aim: to complete the gaps in knowledge.
Method: interviews, document review, literature review, observation, testing or any other method as appropriate.
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4. Final flow diagram
Aim: to develop a high level complete chronological map of the key facts of the incident.
Method: collation and synthesis of gathered information.
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5. Brainstorming
Aim: to systematically list the contributing factors that lead to the incident.
Method: collation and synthesis of gathered information using the final flow diagram to guide.
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6. Cause and effect diagram
Aim: to organise the contributing factors identified in the brainstorming and to develop root causes.
Method: collation of contributing factors using a diagrammatic representation.
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7. Causation statements
Aim: to organise the contributing factors in the cause and effect diagram.
Method: collation of contributing factors using a structured text-based representation.
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8. Formulate recommendations and measures
Aim: to develop interventions to prevent a re-occurrence of the incident.
Method: brainstorm and prioritise organisational actions that impact on the root causes.
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9. Implement, monitor and evaluate recommendations
Aim: to ensure interventions are implemented and the effectiveness of interventions are monitored.
Method: develop action plan for implementation with tasks and responsibility clearly assigned. Use quality improvement methodologies such as Plan-Do-Study-Act cycle for implementation.
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Find out more
Hagley G, Mills PD, Watts BV, Wu AW. Review of alternatives to root cause analysis: developing a robust system for incident report analysis. BMJ Open Quality. 2019 Aug 1;8(3):e000646.
National Patient Safety Foundation. RCA2 - Improving Root Cause Analyses and Actions to Prevent Harm. Boston: NPSF, 2015.
Nicolini D, Waring J, Mengis J. The challenges of undertaking root cause analysis in health care: a qualitative study. Journal of Health Services Research & Policy. 2011;16 Suppl 1:34-41.
Incident management resources published by state and territory health departments.