Operation research is an analytical method that breaks problems down into components and solves them mathematically. It has been used successfully in various areas of management including projects, production, programs, marketing, organization behavior, finance, and research and development. The process of operation research broadly involves formulating the problem, constructing a model, deriving and testing solutions, establishing controls, and implementing the solution. Commonly used techniques include linear programming, queuing theory, inventory control, replacement problems, and network analysis.