WHATS OPERATIONS RESEARCH

Question 1

Where were the first formal activities of Operations Research (OR) initiated in?

Answer 1

England, during world war II.

Question 2

Are designed to optimize a specific
objective criterion subject to a set of constraints.

Answer 2

Operations Research Models.

Question 3

A solution is feasible if it …

Answer 3

Satisfies all the constraints.

Question 4

Are designed to optimize a specific objective criterion subject to a set of constraints, the quality of the resulting solution depends on the degree of completeness of the model in representing the real system.

Answer 4

Though Operation Research Models.

Question 5

It is designed for models with linear objective and constraints functions.

Answer 5

Linear programming.

Question 6

The variables assume integer values here.

Answer 6

Integer programming.

Question 7

The original model can be decomposed into smaller
more manageable subproblems here.

Answer 7

Dynamic programming.

Question 8

The problem can be modelled as a network

Answer 8

Network programming.

Question 9

Functions of the model are nonlinear here.

Answer 9

Nonlinear programming.

Question 10

The most prominent Operation Research technique is…

Answer 10

Linear Programming.

Question 11

In Operation Research techniques solutions
are not generally obtained in (formula-like) closed forms, they are determined by…

Answer 11

Algorithms.

Question 12

Provides fixed computational rules that are applied
repetitively to the problem, with each repetition (called iteration)
attempting to move the solution closer to the optimum.

Answer 12

Algorithms.

Question 13

These deal with the study of waiting lines. They are
not optimization techniques

Answer 13

Queuing and simulation.

Question 14

Queuing models utilize probability and stochastic models to:

Answer 14

Analyse
waiting lines, and simulation estimates the measures of performance
by “imitating” the behavior of the real system.

Question 15

The model expresses in an amenable manner the mathematical
functions that represent the behavior of the assumed real world.

Answer 15

Art of Modeling.

Question 16

Phases of an Operation Research study.

Answer 16

1. Definition of the problem.
2. Construction of the model.
3. Solution of the model.
4. Validation of the model.
5. Implementation of the solution.

Question 17

Involves delineating the scope of the problem under investigation.
This function should be carried out by the entire Operation Research team. The aim is
to identify three principal elements of the decision problem.

Answer 17

Problem definition

Question 18

Entails an attempt to translate the problem definition into mathematical relationships.

Answer 18

Model construction.

Question 19

Is by far the simplest of all Operation Research phases because it entails the use of
well-defined optimization algorithms.

Answer 19

Model solution.

Question 20

Checks whether or not the proposed model does what it purports to do—that is, does it
adequately predict the behavior of the system under study?

Answer 20

Model validity.

Question 21

Of the solution of a validated model involves the translation of the results into
understandable operating instructions to be issued to the people who will administer
the recommended system.

Answer 21

Implementation.