INFORMATION SYSTEM & ITS SOURCES 1. Defining Need Decisions are required to be taken in a day to day life. No single task in our life can be done without decision making. For every assignment we undertake, there has to be a process of making choices. Whenever we are faced with choices, there is an inevitable need for selecting one particular course of action. Any task can be done in various ways, but doing it simultaneously through all possible alternatives is virtually impossible. This necessitates making a reasonable choice from all the options available. An example can be taken for a person who wants to go to a City. He can look at the following options. 1. Use any of the local bus service available 2. Go by train 3. Travel by air As you can see, the decision to be made in this situation is faced wi...