This theory views Theories of Accident cause nt may occur as a system comprised of the follo(host, machine fagency), and environment. The lik ccurring is determined by how these components in tterns of interaction can increase or reduce the probabi r example, an experienced employee who operates a five aus machining center in a shop environment n. Her temporary replacement may be less experienc mponent of the system person host) increases t pro Such a simple example is undenstood. However. ns of are this simple. Some are so subtle quire a team of people, each with a different type of ex primary components of the systems model are the pers nt. information. decisions. risks. and the task to be perfor nents has a bearing on the probability that an accident model is illustrated in Figure 3-5