ASSIGNMENT-I
Q1: What is Operation Research. What is its principal? Also explain different
approximations used in O.R. model
Answers
British/Europeans refer to "operational research", the Americans to "operations research" - but both
are often shortened to just "OR" - which is the term we will use.
Another term which is used for this field is "management science" ("MS"). The Americans
sometimes combine the terms OR and MS together and say "OR/MS" or "ORMS". Yet other terms
sometimes used are "industrial engineering" ("IE") and "decision science" ("DS"). In recent years there
has been a move towards a standardization upon a single term for the field, namely the term "OR".
Operation Research is a relatively new discipline. The contents and the boundaries of the OR are
not yet fixed. Therefore, to give a formal definition of the term Operations Research is a difficult task.
The OR starts when mathematical and quantitative techniques are used to substantiate the decision being
taken. The main activity of a manager is the decision making. In our daily life we make the decisions
even without noticing them. The decisions are taken simply by common sense, judgment and expertise
without using any mathematical or any other model in simple situations. But the decision we are
concerned here with are complex and heavily responsible. Examples are public transportation network
planning in a city having its own layout of factories, residential blocks or finding the appropriate product
mix when there exists a large number of products with different profit contributions and production
requirement etc.
Operations Research tools are not from any one discipline. Operations Research takes tools from
different discipline such as mathematics, statistics, economics, psychology, engineering etc. and
combines these tools to make a new set of knowledge for decision making. Today, O.R. became a
professional discipline which deals with the application of scientific methods for making decision, and
especially to the allocation of scarce resources. The main purpose of O.R. is to provide a rational basis
for decisions making in the absence of complete information, because the systems composed of human,
machine, and procedures may do not have complete information.
Operations Research can also be treated as science in the sense it describing, understanding and
predicting the systems behaviour, especially man-machine system. Thus O.R. specialists are involved in
three classical aspect of science, they are as follows:
i) Determining the systems behaviour
ii) Analyzing the systems behaviour by developing appropriate models
iii) Predict the future behaviour using these models