Since business environment consists of numerous interrelated and dynamic conditions or forces which arise from different sources, it becomes difficult to comprehend at once what exactly constitutes a given environment. In other words, environment is a complex phenomenon that is relatively easier to understand in parts but difficult to grasp In its totality. For example, it may be difficult to know the extent of the relative impact of the social, economic, political, technological or legal factors on change in demand of a product in the market.