Regular users generally don’t like change. When simulation is employed to solve problems, users are generally management or industrial engineers, not the providers to whom the solutions are routinely applied. Without a comprehensive introduction to the tool and its potential, non users view simulation based recommendations as ‘black-box” answers to complex problems.
	To gain acceptance of any solution, regardless of its source, it is imperative that every member of the affected group be involved in the decision-making process. The more complex the problem, the more critical management support and commitment become.
	There is considerable resistance to the dehumanizing nature of time and motion analysis. Most workers in general, and health care providers in particular, regard such things as treatment-time evaluation and standardization as unreasonable and unrealistic.
	Healthcare environment is far more complex than any industrial environment. The idea is to be as flexible as possible and to avoid being imprisoned by your own methods. Take advantage of all the opportunities offered by opposing views by evaluating the model’s sensitivity to its inputs.
	(Lowery et. al., 1994)