The incident investigation methodology whilst always part of the research came later around 1990. The early research focused on a predictive tool to identify underlying causes of incidents before they occurred rather than an incident investigation methodology This would later become the basis for Tripod Delta. If we can identify those failures and take action to remove them we will reduce the probability of accidents.People are usually well intended, trying to get their task done despite the imperfections in the system.Those 'imperfections' are known by some of the people before the incident occurs.Those underlying causes, metaphorically comparable with 'pathogens' are present long before an accident occurs.The underlying causes of controls failing are due to underlying causes in the way we manage.Accidents happen because controls fail (now known as the Swiss Cheese model).The research was based on the following hypotheses Such research contributed towards the development of the Swiss cheese model of accident causation, and in the late 1990s and early 2000s, towards the development of the Hearts and Minds safety culture toolkit. as the result of Shell-funded academic research in the 1980s and 1990s. Tripod Beta was developed by Shell International Exploration and Production B.V.
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