What is AAR: After Action Reviews Explained for Organisations
An AAR** (After Action Review)** is a structured process used to evaluate what happened after an incident, emergency, project, or exercise so an organisation can learn from experience and improve future performance.
For organisations in regulated, high-risk, and critical infrastructure sectors—including government, energy and power, mining, water utilities, ports, transport, and oil and gas—AARs are a practical way to strengthen crisis response, risk management, communication, and organisational resilience rather than repeat the same mistakes.
The review centres on four questions:
What was expected to happen?
What actually happened?
What worked well?
What can be improved?
This guide explains what an AAR is, when to use one, how it differs from an After Action Report, and why it matters for continuous learning, capability building, and better emergency and crisis management outcomes.
What Does AAR (After Action Review) Mean?
AAR stands for After Action Review.
It is a formal review method originally developed by the military and now widely used in:
Government and public sector
Corporate organisations
The outcome of an AAR is usually documented in an After Action Report, which outlines findings and recommendations.
What Is the Purpose of an AAR?
The purpose of an AAR is to:
Identify what worked well
Highlight gaps or failures
Improve plans, processes, and decision-making
Help create actionable recommendations and practical advice for future improvement
The review also gives teams time to reflect on both successes and failures, and to discuss what made outcomes successful.
Instead of assigning blame, an AAR keeps the focus on continuous improvement and organisational learning. It is a formal review method originally developed by the military, originating in the 1970s with the United States Army, and it helps teams strengthen response practices across future incidents.
What Are the 4 Steps of an AAR?
Most AARs sit within a broader four-phase process that many organisations use to conduct AARs: design, prepare, implement, and disseminate. Within that process, the review itself often follows four simple questions:
3.1 What was expected to happen?
This opening question supports the design phase by involving the right participants before clarifying objectives, assumptions, and the intended outcome. Start by outlining the original plan, what the team wanted to accomplish, and any early ideas that shaped the strategy for success. If there were procedures, timelines, or roles involved, these should be clearly stated so everyone has a shared understanding of what was supposed to occur.
3.2 What actually happened?
This step, which sits in the implement phase, focuses on the facts of the event or activity itself. Compare what took place against the original expectations by outlining the original plan, what the team was trying to accomplish, and any initial ideas or strategy that shaped the approach, using relevant data where possible. Highlight key decisions, actions, delays, or changes that affected the outcome. The goal is to create a clear and honest account of events without assigning blame.
3.3 Why were there differences?
Once the gap between expectation and reality is clear, the next step is to explore why it happened. This is where the real value of an AAR begins to emerge. The team should look at factors that contributed to the outcome, including communication issues, available resources, planning assumptions, or external disruptions. Highlight key decisions, actions, delays, or changes tied to each task that affected the outcome, using relevant data such as timelines, records, or logs to support the account. It also helps to identify which person or role took the lead at key points so the discussion stays constructive and focused on learning rather than fault-finding.
3.4 What can we learn from this?
The final question turns reflection into action, with lessons later able to be disseminated through the after action report or follow-up actions. Identify the key takeaways, what should be repeated, and what needs to change next time. This is also the point where organisations can assign actions, update procedures, or improve training. Over time, this helps embed learning into daily operations and makes future responses stronger.
These steps form the foundation of any effective AAR.
When Should You Use an AAR?
An AAR should be conducted after:
A or emergency incident
Business continuity activation
Cyber or IT disruption
Major operational events
Where possible, it should happen immediately after the event so details are still fresh. The goal is to capture insights while the information is still fresh and produce a useful summary of findings and lessons learned for follow-up action. Preparation should begin promptly so the session stays focused.
AAR vs After Action Report
AAR (After Action Review): The process of reviewing what happened
After Action Report: The document summarising findings and recommendations
The review creates the insights — the report records them.
Why Are AARs Important?
Without an AAR, organisations risk repeating the same mistakes because they miss the chance to assess results and the factors behind them.
A well-run AAR helps:
Improve crisis response capability
Strengthen risk management
Enhance communication and coordination
Build long-term relationships that build trust across teams
Identify challenges and support change based on what the review uncovers
Support leadership by helping leaders strengthen decision-making and response capability, which is crucial in high-pressure environments
Every incident becomes a learning opportunity when organisations conduct reviews consistently.
FAQs About AARs
What is an AAR in simple terms?
An AAR is a structured review used to understand what happened during an event and how to improve in the future. For example, a team might use one after an exercise or project to capture lessons learned and strengthen future response.
How long does an AAR take?
It can take anywhere from a few days to several weeks, depending on the complexity of the incident.
Who should be involved in an AAR?
Key stakeholders, decision-makers, and team members involved in the event should all participate in the AAR. Broad inclusion leads to better insights, and in some organisations participation mandatory rules apply for key roles.
Is an AAR only for emergencies?
No — AARs can be used for projects, exercises, and any situation where learning and improvement are important. Some organisations also run an AAR as a workshop after major projects or exercises to support learning and planning.
Final Answer
In this article, AAR means After Action Review, but the acronym can also refer to Against All Risks in insurance, the Association of American Railroads, and Average Annual Return in investing.
Average Annual Return measures investment performance over time and includes key components such as share price increases, capital gains or profit, and dividends.
Investors use it to compare mutual funds over the long term, and it is easier as a simple comparison measure, though it does not account for compounding or return fluctuations.
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