(b) Insufficient knowledge:For perfect rationality, total information leading to complete knowledge is necessary. An important function of a manager is to determine whether the dividing line is reached between insufficient knowledge and the enough information to make a decision.
(c) Not enough time to be rational:The decision maker is under pressure to make decisions. If time is limited, he may make a hasty decision which may not satisfy the test of rationality of the decision.
(d) The environment may not cooperate:Sometimes, the timing of the decision is such that one is forced to make a decision but the environment is not conducive for it. The decision may fail the test of rationality as the environmental factors considered in the decision-making turn out to be untrue. For example, in a product pricing, the factor of oil and petroleum product price is considered as stable. But the post decision environment proves the consideration to be wrong.
(e) Other limitations:Other limitations are the need for a compromise among the different positions, misjudging the motives and values of people, poor communications, misappraisal of uncertainties and risks, an inability of a human mind to handle the available knowledge and human behavior.
http://www.scribd.com/doc/18046759/Chapter-2-various-concepts-of-MIS
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