| Efficiency is a deep-rooted problem, how to evaluate a person's work efficiency and how to evaluate a enterprise production efficiency, how to evaluate a government efficiency and so on, these problems often appear in our daily life. Efficiency evaluation has long been a man, enterprise and even the whole society the key tasks. Efficiency usually refers to how to obtain the less as far as possible put as much as possible output or products. In political economics, the efficiency of resource allocation defined as a kind of ideal, in resource allocation process, in no circumstances make anyone under the premise of bad, make at least one better, thus achieves pareto optimality. This paper involves the efficiency, only refers to the technical efficiency measure, namely in the existing manufacturing technology level premise, the same amount of investment level created the output level and production frontier distance.Academics on the efficiency of research in many ways, this paper main research method is Data Envelopment Data Envelopment Analysis (DEA), order. The Data Envelopment Analysis (DEA), Data Envelopment order is a kind of used to evaluate contains many inputs and outputs index system Decision Making Decision Making units (Unit, DMU) efficiency evaluation method. DEA method by Charnes Rhodes in 1978, Cooper and presented first, this method is put forward by many scholars immediately widely applied in hospitals, hotels, universities, the Olympic Games in different fields, and gradually developed into set applied mathematics, economics, operations research, management science crossover study of a new scientific disciplines.Network DEA refers to the network structure system efficiency analysis. Traditional DEA method put decision unit as a "black box", do not consider decision unit the system structure, ignore system between neutron process, and the mutual influence the efficiency of system subprocesses efficiency the influence of overall efficiency. However reality various production processes often have network system of complexity. The so-called network system refers to a sub - system containing subsystem (the decision-making system (system). Network DEA model can be used to solve the complex system on the problems existing in the process of evaluating, on the other hand can also put DEA evaluation system of "black box" open. The emergence of network DEA, making the DEA method can more in-depth analysis system of various links operation performance as well as various system link the interaction between, improve efficiency analysis accuracy.This paper is mainly includes the research object of subsystem decision system. System structure will have many different ways, this paper selects the most common chain system and parallel type system for research. This paper reviewed the first chapter, the second chapter presents for chain system model, the third chapter presents parallel type system model, the fourth chapter for sum and prospect. This paper respectively on chain system and parallel type system proposed new efficiency evaluation model. Based on the tobacco industry as an empirical research. This paper puts forward the analysis model of enterprise practice. More suit This research for example enterprise the improvement of the efficiency has certain practical significance.This paper main innovations have (1) establish the DEA for chain network structure efficiency evaluation model.(2) establishing the network structure and type according to DEA efficiency assessment model.(3) analysis system of various subprocesses efficiency of the relationship, and between the efficiency of system son process efficiency influences;(4) the empirical analysis (on tobacco enterprise, put forward rational Suggestions). |
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