支持组合服务选取的QoS模型及优化求解

提出了一个支持组合服务选取的QoS模型的层次结构，包括保证基本服务质量的基本服务QoS模型、反映组合服务特性的基本服务间关联QoS模型以及全面评价组合服务质量的组合服务QoS模型，并在此基础上给出了一个QoS驱动的组合服务选取算法．与同类成果相比，该模型在支持组合服务的动态选取、保证组合服务的整体质量方面具有较好的效果．     

SDN云网平台的服务质量模型研究

基于SDN的云网平台逐渐得到广泛应用,云网平台所提供服务的质量评价也越来越受到关注。考虑了云网平台服务所具有的通用云服务和软件化的特点,从服务提供者和用户两个视角出发,对服务质量模型的设计进行了需求分析,并获得服务质量模型的分类维度;参考SQuaRE等国际标准,提出了云网平台服务质量模型QM-SDNCCP,并给出了度量元的计算方法,以达到描述并量化评价云网平台服务质量的目的;对QM-SDNCCP进行了信度分析,表明QM-SDNCCP模型的特性和子特性的设计具有可靠性和一致性。QM-SDNCCP可以应用在技术选型、验收、运维和服务使用阶段,为服务提供者和用户提供云网平台服务选择和质量改进的参考。     

基于平衡计分卡的IT治理模型研究

企业在实施IT治理过程中,对于项目的评价、开发、实施以及维护,需要一种多指标的方法来进行目标分解。平衡记分卡可以帮助企业来分解目标,同时根据对于目标的绩效考察来驱动战略。首先介绍IT治理的概念、模型以及IT平衡记分卡的四个维度,接着提出了一个Cobit与IT平衡计分卡相结合的瀑布模型,解决了IT治理中的绩效评价问题,使得IT治理过程更加完善和成熟。     

ITIL中IT基础架构管理模型设计与实现

为保证企业IT基础架构的稳定可靠运行,结合ITIL理论中IT基础架构管理理念,设计了IT基础架构管理模型。在研究ITIL理论的基础上,为IT基础架构管理划分了三个层次,阐述层次划分的理由以及层次间的关系,最终形成完整的设计模型。在模型设计中,解释了传统的服务概念以及IT基础架构管理模型中使用到的服务的涵义,并且提出了在IT基础架构管理中包含的支撑和依赖关系模型。通过设计IT基础架构管理模型,可以有效的管理IT部门的基础设施,提高企业IT系统的稳定性。     

面向客户视角的QoS集成与组合服务优化

研究Web服务组合网上服务质量(QoS)的评价指标以及组合服务QoS计算模型,建立一种面向客户视角的网下服务质量评价体 系,包括服务费用合理度、服务与描述符合度及服务满意度。以服务费用为约束条件,提出一种的面向客户视角的Web服务QoS集成与组合服务优化模型。分析结果表明,与基于QoS的组合服务选取模型相比,该模型增加了服务质量指标,即网下服务(商品)的质量,更能满足客户需求。     

ITIL中IT基础架构管理模型设计与实现

为保证企业IT基础架构的稳定可靠运行，结合ITIL理论中IT基础架构管理理念，设计了IT基础架构管理模型。在研究ITIL理论的基础上，为IT基础架构管理划分了三个层次，阐述层次划分的理由以及层次间的关系，最终形成完整的设计模型。在模型设计中，解释了传统的服务概念以及IT基础架构管理模型中使用到的服务的涵义，并且提出了在IT基础架构管理中包含的支撑和依赖关系模型。通过设计IT基础架构管理模型．可以有效的管理IT部门的基础设施，提高企业IT系统的稳定性。     

基于云环境下新产品开发团队优选研究

针对云环境下新产品开发团队优选问题,充分考虑团队的研发能力、协调能力和服务质量,建立了包含知识相似度评价模型、协同效应评价模型和服务质量评价模型的综合评价模型;对算法的适应度函数和搜索方式加以改进,提出了改进的人工蜂群算法,对所建立的模型进行求解,为服务需求方选择出最优团队组合;最后,以自动引导运输车（AGV）的新产品开发为例,通过模型求解和算法对比,验证了所提方法的可行性和有效性。     

安全服务质量(QoSS)的评价与控制模型研究

安全服务质量(QoSS)是评价安全系统能否满足用户安全功能需求的重要指标。论文首先给出了基于QoSS的安全服务向量的形式化定义,以方便用户表达和规范化各自的安全需求。然后,在此基础上,提出了一个安全服务质量的评价与控制模型,重点介绍了用户对安全服务满意程度和安全服务成本的计算方法,以及对QoSS进行控制的流程。     

基于人工神经网络的IT项目风险评价模型

[摘要]：首先本文在构建IT项目风险评价体系的基础上,提出一种基于人工神经网络的多指标综合风险评价模型。其次,利用神经网络的自学习和自适应能力,经过训练的神经网络系统能够将专家评价思想以连接权的方式赋予风险评价模型。最后,通过实际IT项目评价数据的验证,该风险评价模型能够准确地按照专家评价法进行工作。     

基于Hopfield网络的信息技术外包服务商评价模型

提出了一套简单有效的IT外包服务商评价指标体系。通过结合层次分析法,建立了一种基于离散型Hopfield神经网络的评价模型,实现了对IT外包服务商的多指标评价。为企业用户评价、选择外包服务商提供了一种新方法。     

提高学生工程能力评价模式的研究与实践

本文剖析了IT专业中,应用型本科的程序设计基础课程的传统课程评价模式的弊端,构建了有助学生工程能力提高的新型评价模式及其实施策略。并通过"程序设计基础"精品课程的改革与建设实践,阐述该模式对落实IT专业课程教学目标,提高教学质量的有效性与可操作性,且对同类特征的IT专业的课程改革与建设具有借鉴作用。     

Organizational impact of system quality,information quality,and service quality

Increased organizational dependence on information systems drives management attention towards improving information systems’ quality. A recent survey shows that “Improve IT quality” is one of the top concerns facing IT executives. As IT quality is a multidimensional measure, it is important to determine what aspects of IT quality are critical to organizations to help Chief Information Officers (CIOs) to devise effective IT quality improvement strategies. In this research, we model the relationship between information systems’ (IS) quality and organizational impact. We hypothesize greater organizational impact in situations in which system quality, information quality and service quality are high. We also hypothesize a positive relationship between system quality and information quality. We test our hypotheses using survey data. Our structural equation model exhibits a good fit with the observed data. Our results show that IS service quality is the most influential variable in this model (followed by information quality and system quality), thus highlighting the importance of IS service quality for organizational performance. This paper contributes theoretically to IS success models through the system quality-to-information quality and IS quality-to-organizational impact links. Implications of our results for practice and research are discussed.     

IT process designs for improving information quality and reducing exception handling: A simulation experiment

Exceptions are cases that cannot be handled adequately in automated information processes (IP); but they can significantly affect IP performance. This research develops a model that captures the exception handling activities required in operational-level information processes. The model is sufficiently general to allow evaluation of the performance of information flow processes employing any combination of people and information technologies (IT). It is used to evaluate alternative designs for using IT to improve the quality of the information produced from IP while reducing the resources required for exception handling. In two simulation experiments using the model, advanced IT improved information quality significantly. They did not, however, always reduce flow time and human resource time. These results provide support for justifying the use of advanced IT in organizations for information quality improvement.     

Building minds, not widgets: technology for the business of learning

Over the past decade, CIOs in both the corporate and academic worlds have focused on creating an IT infrastructure that supports a variety of business processes through networks, mail systems, and enterprise resource planning (ERP) systems. It is clear that to enhance productivity and increase market share, IT must go beyond general business support to a model that improves core product design and quality. Such a shift should occur at institutions of higher education as well. IT provides a competitive advantage only if it improves learning effectiveness while containing the labor costs of instruction. Successful CIOs in higher education are those who can transfer corporate experience to a teaching and learning culture. Key stakeholders n this case, the provost, department heads, and faculty - judge them for their direct contribution to the key university differentiator, the quality of the graduating students. This is a formidable challenge, but one that CIOs must undertake if IT is to reach its full potential in a university setting.     

Evaluating leadership,IT quality,and net benefits in an e-government environment

US Government organizations are creating value for their citizens and businesses by improving their public service delivery through good websites. Our study examined leadership and IT quality, and their effect on positive delivery outcomes in an e-government environment. We first developed a theoretically based model using elements of the model developed for the Malcolm Baldrige National Quality Award (MBNQA) and DeLone and McLean's IS Success model. To test this model, we conducted a field survey at a municipal city government. The results supported our hypothesis that the MBNQA leadership triad (leadership, strategic planning, and customer/market focus) had a positive impact on the IT quality triad (information, system, and service quality). We also found that both leadership and IT quality increased the benefits.     

Determinants of perceived usefulness of e-learning systems

E-learning systems are increasingly essential in universities, schools, government departments and other organizations that provide an education or training service. The objective for adopting e-learning systems is to provide students with educational services via electronic channels. The focus of this study is on the impact of IT infrastructure services and IT quality on perceptions of usefulness of e-learning systems. A model is proposed which includes five constructs: IT infrastructure services, system quality, information quality, service delivery quality, and perceived usefulness. A quantitative study was conducted at an Australian university with 720 survey responses from students who were enrolled in online courses. The results suggest that IT infrastructure services play a critical role in generating information with high quality, enhancing the aspects of e-learning system quality, and improving service delivery quality. The impact of IT infrastructure services, system quality, and information quality on perceived usefulness is fully mediated by service delivery quality. Universities need to be aware of the critical impact of IT infrastructure services and consider how investment in these services could improve system and information quality, service delivery quality, and the usefulness and success of e-learning systems.     

Quality of working life and turnover intention in information technology work

High turnover has been a major issue in information technology (IT) organizations. A conceptual model to explain turnover was developed and tested in two national samples of IT and IT manufacturing work. The model postulates that quality of working life mediates the relations between job/organizational characteristics and turnover intention. The American sample consisted of 624 IT employees of five IT organizations. The Austrian sample consisted of 677 employees from an international IT production company (IT manufacturing work). A similar questionnaire was used in both studies. The model was tested with path analysis. A core model with main pathways between job demands and supervisory support to emotional exhaustion, and between emotional exhaustion and job satisfaction to turnover intention was confirmed in the national samples and in subsamples of demographics and job types. © 2008 Wiley Periodicals, Inc.     

IT infrastructure capabilities and IT project success: a development team perspective

In this research we investigate how IT infrastructure capabilities are related to IT project success from a development team perspective. We first conduct an extensive literature review and summarize the insights to suggest an IT infrastructure base model. Drawing upon several other bodies of literature, particularly the psychology literature, we then build upon the base model to propose an integrative research model for IT project success that considers both actual and perceived effects of IT infrastructure capabilities. This research model argues that (1) teamwork quality mediates the effect of technical and human IT infrastructure capabilities on IT project success, and (2) team perceptions of both IT infrastructure and team capabilities shape team perceived likelihood of project success, which subsequently affects team commitment that is crucial to IT project success. We also propose a direct-effect model that directly links all constructs to IT project success so that we can test the efficacy of our proposed research model by comparing all three models. We then collect empirical data (n = 91) through an online survey of CIO/CTOs and team leaders. All three models are evaluated and compared using the partial least squares method. The results show strong support for the proposed research model except for two IT infrastructure components. We discuss the practical and theoretical implications of the findings, and suggest several ways this research can be extended.     

The Singapore Government's �ole in national computerization efforts

This paper examines the role of the Singapore Government in Singapore's computerization efforts. In restructuring Singapore's economy and sharpening its competitive edge, information technology (IT) is singled out as one of the economic boosting engines whose dynamic, innovative role will change the economic and social fabric of society leading to a better quality of life for Singaporeans. The government and its agencies have deliberately intervened in the IT diffusion process through proactive IT policies, effective regulations and implementation. The national computerization plans, namely, the National IT Plan and the IT2000 Report, contain a set of IT strategic initiatives. Although the socioeconomic conditions and the cultural factors do have a significant influence on the IT diffusion process, an understanding of roles different institutions play and the various institutional policies will provide a better assessment of the impacts of IT on Singapore's information economy.     

Effective information technology (IT) governance mechanisms: An IT outsourcing perspective

Effective IT governance will ensure alignment between IT and business goals. Organizations with ineffective IT governance will suffer due to poor performance of IT resources such as inaccurate information quality, inefficient operating costs, runaway IT project and even the demise of its IT department. This study seeks to examine empirically the individual IT governance mechanisms that influence the overall effectiveness of IT governance. Furthermore, this study examines the relationship of effective IT governance, the extent of IT outsourcing decisions within the organizations, and the level of IT Intensity in the organizations. We used structural equation modeling analysis to examine 110 responses from members of ISACA (Information Systems and Audit Control Association) Australia in which their organizations have outsourced their IT functions. Results suggest significant positive relationships between the overall level of effective IT governance and the following mechanisms: the involvement of senior management in IT, the existence of ethic or culture of compliance in IT, and corporate communication systems.