呈交叉结构的两级乳品供应链DEA效率与前沿面研究

发布时间：2018-04-11 22:40

本文选题：交叉结构 + 两级乳品供应链　；参考：《内蒙古工业大学》2017年硕士论文

【摘要】：经历20世纪初的飞速发展后,我国乳制品行业出现增速放缓、食品安全事故频现等诸多问题。从国家产业政策到企业经营战略都逐渐意识到要想从根本上解决问题必须实现转型增效,这就要求我们首先对效率展开研究。乳品供应链呈现从原料奶生产到乳制品加工、乳制品配送,再到最终销售的复杂供应链结构,在整体研究其效率有困难的情况下,选择其中乳制品加工到乳制品配送的两级供应链效率进行研究是有意义的。因为这两个阶段通常表现为N个乳品加工厂向M个配送中心交叉供应的关系,这样的供应链结构复杂,已有的研究通常只是将其看作是串联的单链,而没有剖析供应链内部结构;而且,这样的两级供应链通常都在乳品加工企业的控制下,协调性强,容易统一决策目标,从而适合作为一个研究对象。根据调研的情况,仔细分析乳制品加工与配送阶段的现状及供应关系,在尽量保持其真实结构的情况下,将具有交叉供应关系的两级乳品供应链模型化,构建了考虑内部结构的同质开放式决策单元。使用Kao等人建立网络DEA模型的思想,在规模报酬不变的假设下,重新编写了适用于本文所述特定结构的,打开“黑箱”的两阶段供应链效率测度公式,实现了决策单元(DMU)及其子决策单元(DMSU)效率的同时测度,能够明确造成DMU低效的原因(例如由其中某个DMSU低效造成);并利用对偶包络模型算出决策单元(DMU)整体的前沿面,进一步研究通过DMU整体的前沿面推导各子决策单元(DMSU)的前沿面,发现当涉及多级供应链时,DMSU的前沿面并不唯一。最后以L乳品集团液态奶事业部的供应链为例,选取适宜的指标进行实证研究,验证了模型的可靠性。得出以下主要结论:(1)模型满足,当且仅当DMU内所有DMSUs的效率都为1时,该DMU的效率为1。(2)开放式DMU的中间投入(产出)可以被看作是在供应链前(后)一阶段并联一个“结构化”的DMSU,从而实现封闭化。(3)单独的串联系统有唯一的前沿面结果,并联系统导致同质的DMSUs前沿面改进值呈特定比例。
[Abstract]:After the rapid development at the beginning of the 20th century, there are many problems such as slow growth rate and frequent food safety accidents in China's dairy industry.From the national industrial policy to the enterprise management strategy, it is gradually realized that to solve the problem fundamentally, we must realize the transformation and increase efficiency, which requires us to carry out the research on the efficiency first.Dairy supply chain presents a complex supply chain structure from raw milk production to dairy processing, dairy distribution and final sales.It is meaningful to select two-level supply chain efficiency from dairy processing to dairy distribution.Because these two stages are usually represented by the cross-supply relationship between N dairy processing plants and M distribution centers, the structure of such supply chain is complex, and the existing research usually only regards it as a single chain in series.The internal structure of the supply chain is not analyzed, and the two-level supply chain is usually under the control of dairy processing enterprises, which has strong coordination and is easy to unify the decision goal, so it is suitable for a research object.According to the investigation situation, the present situation and supply relationship of dairy products processing and distribution stage are analyzed carefully, and the two-level dairy supply chain with cross-supply relationship is modeled under the condition of keeping its true structure as far as possible.A homogeneous open decision making unit considering internal structure is constructed.Using the idea of establishing network DEA model by Kao et al., under the assumption of constant scale return, the two-stage supply chain efficiency measurement formula, which is suitable for the specific structure mentioned in this paper, is rewritten and the "black box" is opened.The simultaneous measurement of the efficiency of the decision making unit (DMU) and its sub-decision unit (DMSU) is realized, and the reasons for the DMU inefficiency (such as caused by one of the DMSU inefficiencies) are defined, and the front surface of the Decision-making unit (DMU) as a whole is calculated by using the dual envelope model.It is found that the front surface of DMU is not unique when multilevel supply chain is involved.Finally, taking the supply chain of liquid Milk Division of L Dairy Group as an example, the model is proved to be reliable by selecting appropriate indicators.The following main conclusion: 1) is satisfied if and only if the efficiency of all DMSUs in DMU is 1,The efficiency of the DMU is 1.2) the intermediate input (output) of the open DMU can be considered as a "structured" DMSU in the front (back) phase of the supply chain, so that the closed.The parallel system results in a specific proportion of the homogeneous DMSUs frontier improvement.
【学位授予单位】：内蒙古工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：F224;F426.82;F274

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