Management science is simply a scientific approach to the solution of operational problems. 

It is concerned with providing management with decision aids or decision rules derived from bellow-
(1)A total system orientation
(2)Scientific methods of investigation
(3)Models of reality,generally based on quantitative measurements and techniques
In previous chapters,we have presented the systems approach.The systematic approach to problem solving parallels the generally accepted steps of management science.These steps consist of
A.Problem solving:-
2.Statement of a problem
3.Collection of data
4.Development of hypotheses for solution of the problem
5.Evaluation of the alternative hypotheses
B.Management science:-
1.Search for problems
2.Statement of a problem
3.Collection of data
4.Development and testing of a model representing the problem solution
5.Manipulation of the model to determine the outcomes of various input conditions
Subsequent to the problem-solving process of developing feasible alternatives is the decision process,in which the parallelism continues.
C.Decision Making and Action:-
1.Selection of best alternative
2.Implementation of best alternative
3.Review of results
D.Management science:-
1.Selection of the best course of action
2.Implementation of the solution
3.Control of the model by maintaining a check on its validity as time goes by on way.

E.Modeling of business:-
We now look at the third characteristic of management science-modeling.Science the time when cave dwellers drew symbols and pictures on the walls of caves,people have utilized 'models'to represent aspects of their environment.It is only recently that scientists in many disciplines have discovered that the term model applies to what they have been doing all along.It now appears that most scientific conversations start with a mention of a model.
The field of MIS is no exception,model are a necessity for both study and design of MIS. Because models are so important,we need to know what they are,what their characteristics are,and how they help us.

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