EI - Tripod

The home of the Tripod Beta accident investigation and analysis methodology

The Stichting Tripod Foundation is a charitable foundation established in 1998 to make the Tripod methodologies publically available. In 2012, the Foundation partnered with the Energy Institute.

The foundation acts as the official accreditation and examination body for recognising Tripod Practitioners and Trainers.


Updated 01/11/2017: We are holding a Tripod User Day in The Hague, 30 January 2018, primarily for Bronze, Silver and Gold Practitioners.  If you'd like to attend, contact tripod@energyinst.org

Updated 28/09/2017: Human factors application in major hazard industries 2017 conference, 17-18 October 2017, London

Updated 13/10/2016: Download the Tripod Beta primer for a sample of the full manual

Updated 29/06/2016: Free Barrier-based risk management event, Netherlands, 19 and 20 September 2017

Updated 25/05/2016: New Tripod accreditation process goes live, in order to help support Tripod practitioners

Updated 05/11/2015: Leads to, Caused by: new guidance released to help people categorize preconditions and underlying causes

Click on the links below to find out more about different Tripod activities:

Tripod Beta: Accident/incident investigation and analysis methodology


Tripod Delta: can you predict incidents before they happen?


Tripod videos and other resources


Accident investigation/analysis training courses

Find an accredited Tripod Trainer


Become an accredited Tripod Beta PractitionerBecome-accredited

What is Tripod?

Learning from accidents and incidents is key to improving health, safety and environment (HSE) performance. However, all too often, incident investigations do not go far enough to:

This can result in organisations failing to address these underlying cultural and organisational issues, making it likely that the same types of incidents will happen in future – and that future incidents will have similar root causes.

Furthermore, if it is known what the common root causes of incidents are it can even be possible to predict and prevent incidents before they happen.

Borne out of research commissioned by Shell International and carried out at the Universiteit Leiden and the University of Manchester during the 1980s and 1990s, Tripod is a theory for understanding incidents and accidents. It was developed to explain how and why incidents happen, and allow the root organisational causes and deficiencies to be uncovered and addressed.