Decision making is the purposeful selections from among a set of alternatives in light of a given objectives. It is not a separate function of management. In fact, decision making is intertwined with the other function such as Planning, Coordinating and Controlling. Those functions all require that decision be made. For example if the outset, management must make a critical decision as to which of several strategies would be followed.

Such a decision is often referred to as strategic decision due to its long term impact on the organization also managers must make scores of lesser decision, tactical and operational, all of which are important to the organizations well being.

The operation of any organization is the running of a business making many decision. These can be made instantly or carefully as a result of systematic planning. Managers do an action constantly that affects the firm. How products are introduced, old ones are dropped, prices are raised and lowered, these actions, and others are taken as a result of a decision at determining that one course of action will be followed and others not. A manager cannot be too sure that his decision is the best alternative choice for the outcome of the other is not known, but if the decision is based on the best available information, he can be assured that his decision is okey.
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