Modeling in Operation Research

A model is defined as a representation of real life system whether such system refers to a problem, process, operations or events. Models enable us to experiments more effectively than on the system itself which is either impossible or too costly.
Advantages of a model –
 Describes problem concisely.
 Systematic & logical approach to the problem.
 Indicate the scope and limitation of the problem.
 Deals with entire problem.
 Use high power mathematical tool.
 Help in finding avenues for new research and improvement in a system.
Disadvantage of a model –
 Only an attempt to understand the problem and never considered as absolute
 Validity of any model only be verified by carrying an experiment.
Characteristics of a good model –
(i.) Flexibility – should be capable of adjusting.
(ii.) Less no. of variable – no of variable in a model should not be large but important facts should not be left over.
(iii.) Less Time – should not take much time in construction