# 运筹研究assignment-关键概念

 问题1.解释运筹学模型的类型。简要解释运筹学的阶段？ Q.1 Explain the types of Operations Research Models. Briefly explain the phases of Operations Research?   Ans 回答 运筹学：运用科学的方法、技术和工具，对一个系统进行操作，使问题得到最佳的解决方案，而最佳化则指最佳方案.。 研究模型的类型： 物理模型：-有两种类型-标志性和模拟模型。这些模型包括图表、图表和图表的所有形式.。他们是设计来解决具体问题。他们提出了重要的因素和相互关系的图片形式，便于分析。   Operation Research : The application of scientific method ,techniques and tools to the operation of a system with optimum solution to the problem and where optimum refers to the best possible alternative .   Types of research model:   Physical model:- There are two types -iconic and analog model. Theses models include all form of diagrams, graphs, and charts. They are design to tackle specific problems. They bring out significant factors and interrelationship in pictorial form to facilitates analysis.   Mathematical or symbolic Model: - These models employ a set of mathematical symbol to represent the decision variable of the system. The variables are related by mathematical systems. Some examples of mathematical model are allocation, sequencing and replacement models.   Models by nature of environment: - Two types of it Deterministic and probabilistic models.   Deterministic Model – These are the models in which everything is defined and the results are certain, such as EOQ model. Probabilistic Model – There are the model in which the input and output variables follow a defined probability distribution, such as the games theory. Models by extent of generality:-   General models – These are the models which can apply in general to any problem. For example- linear programming. Specific model - These are the model that you can apply only under specific condition. For example, you can use the sales response curve or equation as a function in marketing function. Phases of Operational research –   Judgement Phase – Determination of the operations. Establishment of objectives and values related to the operations. Determination of suitable measures of effectiveness. Formulation of problems relative to their objective. Research phase - Operation and data collection for a better understanding of the problems Formulation of hypothesis and model. Observation and experimentation to test the hypothesis on the basis of additional data.(责任编辑：BUG)
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