Systems Theory of Causation

One variation of the Multiple Causation Theory is R. J. Firenzie s Theory of Accident Causation. Firenzie s theory is based on interaction among three components person, machine, and environment. Human variables of information, decisions, and perception of risks combine with machine hazards and environmental factors affecting the likelihood of an accident. 

For example, as a person operates a noisy bulldozer on a hot day, other activities must take place for the operator to safely and effectively perform the job. The person consciously or unconsciously will collect information, weigh risks, and make decisions as to how to perform the task. How close should the bulldozer get to the 20-foot-high spoil bank or the electrical power lines How fast should it be moving The operator, based on knowledge and experience, makes countless decisions—all of which affect the probability of an accident. 

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