电力企业选择IT外包的选择与策略

电力企业信息化建设,采用IT外包不但可以降低信息技术服务成本,而且能快速提升电力企业的信息化水平。本文对电力企业信息化特点进行了总结,分析了IT外包服务的优势和存在的问题,提出电力企业IT外包选择应根据企业的目标和战略对有效性、管理和运营、与供应商的关系、整合度进行评估。电力企业对于规范程度高、影响不大的信息业务可以采用外包,对没有标准规范,无法采用外包或者效果不明显信息业务,应采用自主模式进行开发应用。     

基于多因素关联分析的IT服务外包商选择方法

针对具有多因素关联的IT服务外包商选择问题,提出了一种基于多因素关联分析的决策分析方法。在该方法中,借鉴决策试验和评价实验室(DEMATEL)法的思想进行影响IT服务外包商选择的多因素关联分析,并利用二元语义表示模型分别处理和集结语言短语形式的因素关联信息和备选IT服务外包商的评价信息,进而确定因素重要程度和归类,并获取备选IT服务外包商的综合评价值,以便进行IT服务外包商的排序与选择。实例分析表明,提出的方法具有可行性和有效性。     

基于“TOPSIS／DEA／AHP”模型的战略性供应商选择

研究了供应链环境下战略性供应商选择的问题.通过分析和总结供应商评价选择的准则、指标和方法,以供应链核心企业选择战略性供应商为目标,提出了战略性供应商评价的指标体系,利用整体DEA有效模型来反映供应商的绩效,利用AHP反映供应链核心企业选择供应商的主观愿望,从而构建了TOPSIS与整体DEA有效相结合的"TOPSIS/DEA/AHP"战略性供应商评价选择模型,并通过实证分析,证实了该模型及方法的可行性.     

考虑满意度交互的IT服务外包匹配决策方法

IT服务外包的发展为企业和服务提供商提供了全新的运营模式与平台。针对IT服务外包中发包商与提供商的匹配问题特点,提出了一种基于多指标语言交互评价信息的匹配决策方法。根据发包商与提供商双方互评的满意度评价指标体系,针对IT外包互动匹配测评指标的特点,给出了基于二元语义信息处理的IT外包互动匹配测评方法,并建立了发包商与提供商互动匹配的矩阵模型,通过该模型可分析两者的匹配程度并针对不同区域给出决策分析。最后通过BSI公司的实例分析说明了所给方法的实用性和有效性。     

基于FMEA的军队第三方物流供应商选择

目的 针对军队第三方物流供应商的选择问题,从风险视角对供应商完成军事保障任务过程中可能存在的风险进行识别和评估,以降低军事物流外包风险,为军队第三方物流供应商决策提供方法和思路。方法 提出可将FMEA技术运用于军队第三方供应商选择中的操作性框架,按照框架流程确定评价标准、识别潜在失效模式、决策分析,可更加全面、科学地对军队第三方供应商做出选择。结果 在不考虑风险的情况下,5家候选供应商中E的原始评分最高,D排名居中,但经过FMEA分析后,由于E在单项评价指标上的风险比例太大,而D的各项指标风险比原始排名靠前的供应商小很多,因此D成为军队最终选择的供应商。结论 利用FMEA分析军队第三方物流供应商选择问题,可以起到事先识别可能出现的失效模式,分析产生原因和可能导致的后果以及现有措施的可控程度,从而评估每位候选供应商在确定的评价标准中的风险大小,最后综合原始评分得出了供应商选择的结果。该方法操作简单、计算方便,能比较全面衡量军队第三方物流供应商的综合水平,有助于提高军队物资保障效率,降低物资保障风险。     

基于犹豫模糊广义Choquet积分的风险型供应商选择方法

针对传统供应商选择方法没有考虑市场风险因素以及决策者风险态度的问题,提出了一种基于TODIM的风险型供应商选择方法。针对模糊集处理评价信息的不足,采用犹豫模糊数处理决策者给出的供应商评价值,可以有效反映决策者的不同意见和犹豫性。采用犹豫模糊测度的广义Choquet积分对指标间的相互影响关系进行分析,计算指标权重。考虑到决策者的风险态度,采用改进的TODIM方法对决策者进行心理偏好分析并对各候选供应商进行排序。最后以某生鲜企业选择生鲜候选供应商为例,验证了所提方法的有效性。     

Gartner 2012年全球市场预测

<正>预测1:到2015年,低成本云服务将蚕食外包服务提供商15%的收入工业化低成本IT服务(ILCS)是一种新兴市场力量,在未来的3-5年,该新模式将重新设定IT的价值取向。低成本云服务将蚕食现有和潜在外包收入。供应商会更多采用新的、基于云的工业化     

考虑不完全语义信息的风险型供应商选择方法

考虑供应商选择中决策者的风险态度,提出了一种考虑不完全语义决策信息的风险型供应商选择方法。结合二元语义模型和D数获取并处理决策者给出的不确定性和不完全的供应商评价信息,基于D数信息融合模型获取集结后的群决策信息。基于累积前景理论对候选供应商进行评价,考虑市场竞争获取前景价值函数,基于综合前景值最大化优化模型获得的指标权重对供应商进行排序。最后以挖掘机救援与现场维修服务供应商的评价与选择为例,验证了所提方法的有效性。     

供应商整合与企业绩效:IT能力的调节作用

根据在中国制造企业调研获取的176份有效问卷,用探测性因子分析和验证性因子分析探析并验证了供应商整合包括战略层的供应商关注以及运营层的供应商参与和供应商交流。基于此,构建了供应商整合与企业绩效(运作绩效和财务绩效)的关系模型,同时检验了IT能力对供应商运营层整合与企业绩效间作用关系的调节效应。层次回归分析的结果表明:供应商关注和供应商交流显著提升运作绩效,而仅供应商关注正向改善财务绩效;IT能力显著调节供应商运营层整合和财务绩效之间的关系,但对其与运作绩效之间关系的调节效应不显著。     

供需随机和资金约束下新创企业的运营决策

考察由OEM供应商、新创企业和需求市场组成的供应链,其中新创企业通过自建产能或向OEM供应商采购来满足市场需求,研究受资金约束的新创企业以股东权益价值最大为目标时产能设置和订货数量的最优决策。研究表明,当债权融资金额无限制时,随着新创企业初始自有资金逐渐增加,新创企业的最优产能先是保持不变,然后逐渐增加,最后下降;当初始资金非常匮乏时完全采用外包策略以及在资金较充分时彻底抛弃外包都不是最佳选择。     

A comparison between robust z and 0.3-Logit Difference procedures in assessing stability of linking items for the Rasch model

There are at least two procedures to assess item difficulty stability in the Rasch model: robust z procedure and ".3 Logit Difference" procedure. The robust z procedure is a variation of the z statistic that reduces dependency on outliers. The ".3 Logit Difference" procedure is based on experiences in Rasch linking for tests developed by Harcourt. Both methods were applied to archival data from two large-scale South Carolina assessment programs: HSEE 1986/1987 and PACT 2004/2005.The results of the analysis showed the ".3 Logit Difference" procedure identifies slightly more stable items (2.6%) for all items under study. In addition, approximately 93% of all items under consideration were identically classified as stable or unstable for both procedures. This very high level of agreement between the two methods indicates that either procedure can be safely used to identify stable items for use in a common-item linking design. The advantage of the robust z procedure lies in its foundation of robust statistical inference. The procedure takes into account well-accepted models for identifying outliers and permits critical values set at a specified Type I error.     

A simplified simulation method for selecting the most effective off-site protective action

In order to facilitate a number of calculations needed to quantify effectiveness of off-site protective actions for various emergency scenarios for emergency planning of nuclear facilities, we developed a simplified simulation method for selecting the most effective protective action among candidates of action. The protective actions considered are sheltering in houses, sheltering in public concrete building, evacuation, and iodine prophylaxis. The method has functions of (1) simulating the movement of members of the public under protective actions and calculating avertable dose by protective actions in short computing time, and (2) selecting the most effective protective action for divided areas around a nuclear site. To achieve short computing time in function (1), we applied a multivariate analysis method by using sample data obtained from results calculated with a program for simulating the movement of members of the public under protective actions with a detailed mathematical model that requires long computing time. As to function (2), we focused on net benefit, namely avertable dose minus an intervention level, of a protective action. Intervention levels used are those that IAEA proposed based on justification and optimization of protective actions by taking account of benefit and disadvantage due to protective actions. Analysis results by the simplified simulation method showed good agreement with those by the detailed simulation program. Application of the simplified method to a model nuclear site demonstrated that the method was useful as it provided the most effective protective action area depending on source terms, meteorological conditions, and so on.     

不确定条件下基于TODIM的VFFS包装机选择方法

目的研究一种立式成型-充填-封口(Vertical Form-Fill-Seal,VFFS)包装机选择的不确定性多属性决策方法。方法通过对VFFS包装机选择的效益型指标和成本型指标进行分析,对VFFS包装机选择问题进行了形式化描述,构建了基于TODIM方法VFFS包装机选择的不确定性多属性决策模型,并以VFFS包装机选择实例进行了分析验证。结果直觉模糊加权平均(IFWA)算子处理了指标权重和定性指标的主观性和不确定性,考虑到决策者具有参照依赖和损失规避行为,给出了VFFS包装机选择的TODIM决策方法。结论利用IFWA算子和TODIM组合方法对模糊性、不确定性决策信息处理和对每个方案的全局价值求解,有利于从不同类型的VFFS包装机备选方案中进行选优。     

A Cutting Parameter Optimization System Design Based on Mathematical Models and Databases of Parameters

To solve the problem of difficulty in selecting NC cutting parameters by the redundancy technique, a method is put forward to optimize cutting parameters based on a revolutionary mathematical model and a revolutionary cutting parameters database. By use of fuzzy inference rules, it can not only make the method itself evolved and updated, but also ensure data to be correct and feasible from the two optimization routes. Practical running and testing proved that this method can facilitate for the user to select parameters and greatly improve the processing efficiency.     

Selection of multiple optimal absorption transitions for nonuniform temperature sensing

A crucial aspect in the design of sensors based on absorption spectroscopy involves selecting the optimal transitions. Therefore, the goal of this paper is to develop a method of selecting multiple optimal transitions for the measurement of nonuniform temperature distributions based on absorption spectroscopy. Previously developed methods are largely restricted to the relatively simple case of selecting two transitions for uniform distributions. Our new method addresses the restrictions of previous methods and is applicable to more general cases. The method was validated using both numerical tests and experimental results and is expected to be useful in the design of sensors based on multispectral absorption spectroscopy.     

基于竞争力的企业合作伙伴选择的灰局势决策

给出了灰局势决策的原理与方法,介绍了不同极性目标的效果测度变换方法,提出了基于竞争力的企业合作伙伴选择的评价指标,得出了基于企业竞争力评价的合作伙伴选择的一般步骤,建立了决策模型。     

基于有限元方法的压缩机气缸焊接变形分析

焊接是压缩机部件连接中的主要方式,同时会造成结构的变形而影响到压缩机可靠性。采用双椭球移动热源的热弹塑性有限元分析方法,对压缩机气缸进行了焊接变形分析。实验证明该方法具有较高的准确性,可应用于评估压缩机中焊接带来的零件变形情况,及进行焊接件结构优化和方案筛选,并已在产品开发中得到了应用。     

改进灰色沉降预测模型及其应用

根据GM(1,1)灰色模型的指数特性,首先对原始数据取λ次幂以降低原始数据的分散性,再通过在区间上求积分计算模型的背景值,并采用最小二乘法求解最优的模型初始值由此建立改进灰色预测模型,将其应用到某高速公路沉降预测计算,结果表明,改进模型较之原GM(1,1)模型模拟和预测精度要高.     

Using Confidence Intervals to Compare Process Capability Indices

Process capability indices are widely used to measure process performance. In situations such as selecting a supplier and assessing process improvement, it is of interest to compare capability indices for two different processes or the same process before and after an adjustment. In this paper, we consider several methods for performing this comparison on the indices C_pk and C_pm. The methods are compared using a computer simulation. Recommendations are provided for selecting an appropriate method based on power and test size computations.