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随着核心竞争力理论以及供应链理论在石油化工行业的应用,越来越多的石化企业倾向于外包本企业的非核心业务,比如说物流服务.尽管石化企业希望外包自己的物流服务,但在选择合适的物流服务供应商方面,却遇到了困难,由于没有合适的选择模型,大部分石化企业在选择物流服务供应商的过程中还沿袭传统采购的经验,价格作为主要选择指标,然而对于服务采购,由于采购对象的特殊性,采用传统采购方法很难找到合适的供应商.在此背景下,在研究化工物流特征的基础上,提出化工物流服务供应商评估指标,并运用层次分析法和专家打分结合的方法构建了化工物流服务供应商的评估体系,最后通过案例,检验新方法的有效性.研究成果为石化企业选择合适的物流供应商提供了依据. 相似文献
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供应商对形成企业的竞争力起着关键性的作用。采购决策中,采购商需要决策两方面的问题:应该选择哪些供应商以及在每一供应商应该采购多少。本文考虑了多目标性和目标的模糊性,同时为供应商选择和采购量分配提出了一个集成的决策模型。最后,通过一个算例阐释了该模型。 相似文献
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战略采购中供应商选择的AHP—PROMETHEE方法研究 总被引:3,自引:1,他引:2
在供应链环境下,战略采购的出现给供应商群体的优化设计提出了一些新问题,并且多准则决策理论(MCDM)在供应商选择中并没有得到充分运用;本文结合战略采购的特点,选择指标着重体现供应商的合作性和长期性,选择方法上结合了层次分析法(AHP)和偏好顺序结构评估法(PROMETHEE),并进行了算例分析;旨在对战略采购中的供应商选择进行合理、客观的判断. 相似文献
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制造企业在确定供应商过程中,必须对供应商进行评价和选择,由于制造业的加工设备和加工工艺的复杂性,同时要确保供应商供货稳定和质量保证等多方面的因素,其评价指标体系必然有别于其它行业的评价指标.采用粗糙集属性约简的方法,对供应商评价选择指标进行约简分析,运用层次分析法对供应商进行评价选择. 相似文献
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基于供应链风险和供应链绩效的模糊性和供应商选择问题的动态性,本文考虑供应链风险和供应链绩效作为模糊变量,讨论如何给生产商一个满意的动态多目标供应商选择方案,确定供应链风险和总成本最小,以及供应链绩效最大。然后对该问题提出了一个动态多目标多产品供应商选择模型,该模型是首次同时考虑供应商选择,订单分配,供应链风险和供应链绩效的一个模糊动态非线性多目标规划模型。为了去模糊化和求解该模型,给出了一个风险和绩效的模糊评估法。最后给出一个数值算例验证了该模型的可行性,为决策者选择供应商提供了理论依据。 相似文献
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由于供应商选择问题直接影响着企业的最终收益,所以它对企业来说一直是一个重要的决策问题.在以往的研究中,供应商选择仅仅是从产品零部件的角度去考虑而没有从产品的整体出发.此外,传统的供应商选择都是发生在产品设计阶段之后的产品生产阶段.然而,在产品设计初期考虑供应商选择问题可以有效地避免合适供应商的短缺问题.提出了一个基于产品平台的多目标供应商预选方法,并在产品设计初期从产品整体角度建立了一个以最小化产品族外包成本、最小化产品族生产风险以及最小化供应商供应时间为多目标的优化模型,从而有助于决策者在产品开发的早期对产品整体设计方案进行改善.此外,由于产品平台存在部件共享问题,因此在优化模型中也考虑了部件共享对供应商预选结果的影响.采用非支配排序遗传算法(NSGA-Ⅱ)对优化模型进行求解,并通过实际案例来说明提出的优化方法以及求解算法的合理性和有效性. 相似文献
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针对不确定环境下具有不同供应合约的供应商选择与订单分配问题,本文构建了基于风险-均值分析的模糊两阶段多周期集成优化模型。与传统的该问题研究并未充分考虑供应商选择与订单分配两阶段决策的交互影响不同,在该模型中,第一阶段供应商选择的评价目标依赖于后期实际运营中的订单分配决策;并考虑未来需求和实际运营成本的不确定性,引入在险价值和期望值两种决策准则对供应商选择方案的绩效进行评价。提出了该模型的分析求解方法,在险价值得以精确评估,期望值被控制在确定的误差范围内,并可以达到足够的精度要求。 相似文献
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Software as a service (SaaS) has moved quickly from a peripheral idea to a mainstream phenomenon. By bundling a software product with delivery and maintenance service, SaaS providers can effectively differentiate their products with traditional shrink-wrap software (SWS). This research uses a game theoretical approach to examine short- and long-term competition between SaaS and SWS providers. We analyze the factors that affect equilibrium outcomes, including user implementation costs, SaaS provider’s operation efficiency, and quality improvement over time. Bundling software with service lowers software implementation cost for users, and our results suggest that it increases equilibrium prices. In providing software services, SaaS providers have to incur significant operation cost. In the long run, service operation cost may significantly affect SaaS firm’s ability to improve its software quality. 相似文献
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Vendor managed inventory (VMI) is an inventory management strategy to let a vendor manage his retailers’ inventories, which makes the vendor have the opportunity to obtain some inventory and market-related information of his retailers. This paper discusses how the vendor can take advantage of this information for increasing his own profit by using a Stackelberg game in a VMI system. The vendor here is a manufacturer who procures raw materials to produce a finished product and supplies it at the same wholesale price to multiple retailers. The retailers then sell the product in independent markets at retail prices. Solution procedures are developed to find the Stackelberg game equilibrium that each enterprise is not willing to deviate from for maximizing his own profit. The equilibrium makes the manufacturer benefited, and the retailers’ profits maximized. The equilibrium can then be improved for further benefiting the manufacturer and his retailers if the retailers are willing to cooperate with the manufacturer by using a cooperative contract. Finally, a numerical example and the corresponding sensitivity analysis are given to illustrate that: (1) the manufacturer can benefit from his leadership, and monopolize the added profit of the VMI system in some cases; (2) The manufacturer can further improve his own profit, and then the retailers’ profits by the cooperative contract, as compared to the Stackelberg equilibrium; (3) market and raw material related parameters have significant influence on every enterprise’s net profit. 相似文献
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This paper investigates a fuzzy multi-objective vendor selection program under lean procurement based on cost minimization, delivery schedule violation minimization, and maximizing the quality level of the purchased quantity. Specifically, the paper incorporates the vendor production capacity uncertainty into the model to identify an appropriate selection policy for vendors under practical operating conditions. The use of a soft time-window mechanism for the vendor selection model enables decision makers to further incorporate a time based performance metric for vendor evaluation, based on the degree of urgency or need for a part. A solution algorithm using fuzzy AHP is proposed. The results of a numerical example suggest that decision makers prefer vendors who can promise tighter delivery schedules rather than on cost or quality. A sensitivity analysis of the soft time-window on the achievement of the lean procurement objectives is also conducted. 相似文献
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企业经营敏捷性的评价指标体系和模糊综合评价 总被引:1,自引:0,他引:1
企业经营敏捷性由一系列指标来体现.4个一级指标分别是市场反应程度、企业组织桑性、企业管理适应性与企业文化创新性、企业经营业绩.4个一级指标又包含19个二级指标.运用模糊综合评价方法,构建了企业经营敏捷性的评价模型.依托实际案例,使用所建立的评价指标体系和评价模型,对实例企业进行了模糊综合评价,根据评价结果判断企业是否具备经营敏捷性. 相似文献
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Based on continuous review (r, Q) policy, this paper deals with contracts for vendor managed inventory (VMI) program in a system comprising a single vendor and a single retailer. Two business scenarios that are popular in VMI program are “vendor with ownership” and “retailer with ownership”. Taking the system performance in centralized control as benchmark, we define a contract “perfect” if the contract can enable the system to be coordinated and can guarantee the program to be trusted. A revenue sharing contract is designed for vendor with ownership, and a franchising contract is designed for retailer with ownership. Without consideration of order policy and related costs at the vendor site, it is shown that one contract can perform satisfactorily and the other one is a perfect contract. With consideration of order policy and related costs at the vendor site, it is shown that one contract can perform satisfactorily and the performance of the other one depends on system parameters. 相似文献
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Leopoldo Eduardo Cárdenas-Barrón Hui-Ming Wee Mauricio F. Blos 《Mathematical and Computer Modelling》2011,53(5-6):991-997
In the past, economic order quantity (EOQ) and economic production quantity (EPQ) were treated independently from the viewpoints of the buyer or the vendor. In most cases, the optimal solution for one player was non-optimal to the other player. In today’s competitive markets, close cooperation between the vendor and the buyer is necessary to reduce the joint inventory cost and the response time of the vendor–buyer system. The successful experiences of National Semiconductor, Wal-Mart, and Procter and Gamble have demonstrated that integrating the supply chain has significantly influenced the company’s performance and market share (Simchi-Levi et al. (2000) [1]). Recently, Yang et al. (2007) [2] presented an inventory model to determine the economic lot size for both the vendor and buyer, and the number of deliveries in an integrated two stage supply chain. In this paper, we present an alternative approach to determine the global optimal inventory policy for the vendor–buyer integrated system using arithmetic–geometric inequality. 相似文献
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提出了一种基于模糊数据包络分析的企业资源计划系统选型方法.以系统的实施复杂性、预计实施成本、功能匹配度和系统供应商的企业形象等作为主要评价指标,运用模糊集相关理论争方法对系统选型过程中的不确定性进行刻画和描述,对候选系统的相对有效性进行客观评价,解决了系统选型过程中的不确定性和模糊性问题.并通过实证研究说明了该方法的应用. 相似文献
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供应商管理用户库存(VMI)作为一种有效的补货机制,能对购买渠道的需求信息做出积极正确的反应.现在对VMI的研究往往集中于单个零售商和单个供应商组成的系统,不考虑VMI系统受市场上其他零售商或供应商的影响.假设市场上多个零售商出售相互之间可替代的产品,某个零售商与其供应商之间应用VMI系统.我们的研究主要有两方面:1)VMI系统是否有助于零售商和供应商组成的供应链在差异产品市场上获得更大的收益;2)供应商和零售商如何决策是否应用VMI系统。 相似文献