Synopsis Strategy refers to decisions bearing on the future of an enterprise defining its direction and scope in the long run. These decisions ideally involve matching of resource to the changing environment, and determining what the enterprise ought to be doing in the years to come and how it should position itself to take advantage of the future market opportunities. Strategy may thus be defined as "the pattern of an organisation's responses to its environmental over time". It implies that strategy may or may not involve explicit formulation of what the organization intends to do. The operating Systems studied by operations research workers arise in a wide variety of practical industrial, military, and governmental environments, it follows that the results of their research frequently make important contributions to the solution of problems of choice, policy, and planning that arise in these environments; these contribu-tions are characteristically made by presenting the research findings directly to the executives in charge of the operations that are studies. Thus an important goal of much operations research is assistance to executives in improving the operations under their control.