introduction

The 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"), "decision science" ("DS"), and “problem solving”.“Operations Research (Management Science) is a scientific approach to decision making that seeks to best design and operate a system, usually under conditions requiring the allocation of scarce resources.”When OR is used to solve a problem of an organization, beginning with Definition of the problem, Construction of the model, Solution of the model, Validation of the model and then Implementation of the solution. operation research Closely related to several other fields such as applied mathematics,computer science,economics,industrial engineering,and
systems engineering.