3,103 research outputs found

    Information integration – an essential pillar in e-government development

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    The purpose of this paper is to explain and promote the need for ERP implementation in the public sector, to support the growing request for effective information systems, from the e-government viewpoint and under its influence. The paper also debates the major challenges in ERP implementation issued from research of published case studies. The challenges analysis turns out four major issues to address in order to overcome the integration obstacles and create a solid infrastructure for e-government.integration, Enterprise Resource Planning (ERP), e-government, public sector, business process reengineering (BPR)

    Aviation Organization Strategy Development in National Airspace Modernization

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    The purpose of this qualitative study was to determine how small sub-directorates within larger organizations develop strategy to accomplish expansive legacy infrastructure re-engineering. There is significant, historical academic inquiry on Technological Transitions (TT)s with respect to infrastructure modernization; the conversion of the National Airspace System from ground-based to space-based navigation is an example of a TT. There are also studies on how to re-engineer legacy software systems to continue supporting organizational needs. This study is intended to explore a case of re-engineering the expansive legacy ground-based navigation system in the United States by efficiently reducing the size of the network and expanding then verifying signal coverage on over 4.5 million square miles. It is not a pure TT, nor a pure software re-engineering, but rather a large-scale re-engineering of a pre-existing hardware and software infrastructure. It constitutes a nationwide effort to re-design and expand the legacy ground-based navigation system developed over 70 years. The Federal Aviation Administration (FAA) advised the public in 2011 that it intended to re-engineer and reduce the Very High Frequency Omnidirectional Range (VOR) network from 896 stations down to 593 stations - to be defined as the Minimum Operational Network (MON). This reduction was based on the premise that two-thirds of the legacy VORs would be retained but their coverage expanded to cover twice the airspace within the US than the previous network. The FAA Flight Program Operations (FPO) is a small sub-directorate within the larger organization that is now responsible to validate signal coverage on several million square miles of additional airspace. Understanding how the FPO develops strategy and leverages technology to support this endeavor can provide a repeatable template for future, expansive, legacy infrastructure re-engineering efforts. This study discovered that the FPO developed and iteratively evolved strategy to accomplish the VOR MON using tribal knowledge, subject matter expertise and accepted business re-engineering practices. The template can be applied to other legacy infrastructure re-engineering efforts to support forthcoming TTs

    Security-Driven Software Evolution Using A Model Driven Approach

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    High security level must be guaranteed in applications in order to mitigate risks during the deployment of information systems in open network environments. However, a significant number of legacy systems remain in use which poses security risks to the enterprise’ assets due to the poor technologies used and lack of security concerns when they were in design. Software reengineering is a way out to improve their security levels in a systematic way. Model driven is an approach in which model as defined by its type directs the execution of the process. The aim of this research is to explore how model driven approach can facilitate the software reengineering driven by security demand. The research in this thesis involves the following three phases. Firstly, legacy system understanding is performed using reverse engineering techniques. Task of this phase is to reverse engineer legacy system into UML models, partition the legacy system into subsystems with the help of model slicing technique and detect existing security mechanisms to determine whether or not the provided security in the legacy system satisfies the user’s security objectives. Secondly, security requirements are elicited using risk analysis method. It is the process of analysing key aspects of the legacy systems in terms of security. A new risk assessment method, taking consideration of asset, threat and vulnerability, is proposed and used to elicit the security requirements which will generate the detailed security requirements in the specific format to direct the subsequent security enhancement. Finally, security enhancement for the system is performed using the proposed ontology based security pattern approach. It is the stage that security patterns derived from security expertise and fulfilling the elicited security requirements are selected and integrated in the legacy system models with the help of the proposed security ontology. The proposed approach is evaluated by the selected case study. Based on the analysis, conclusions are drawn and future research is discussed at the end of this thesis. The results show this thesis contributes an effective, reusable and suitable evolution approach for software security

    The real SAPÂź Business one cost : a case study of ERP adoption in an SME

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    This paper reports on a UK based service management Small and Medium-sized Enterprise (SME) that invested into SAP¼ Business One. The action research case study highlights the real cost and difficulties faced in moving to the one single SAP system and the process that was followed in order to identify third-party vendors that can integrate or customise SAP¼ Business One. This paper highlights the additional costs required to ensure a ‘fit-for-purpose’ solution to close the gap between strategic needs and the existing SAP Business One solution. The gap itself is illustrated by highlighting 10 key functionalities expected by the given service management SME. The actual implementation cost of the Enterprise Resource Planning (ERP) was found to be approximately double the initial SAP costs. The real costs involve time for, among other things, process reengineering, strategic decision making, software add-ons, staff-training, project-management and software maintenance

    Business rules based legacy system evolution towards service-oriented architecture.

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    Enterprises can be empowered to live up to the potential of becoming dynamic, agile and real-time. Service orientation is emerging from the amalgamation of a number of key business, technology and cultural developments. Three essential trends in particular are coming together to create a new revolutionary breed of enterprise, the service-oriented enterprise (SOE): (1) the continuous performance management of the enterprise; (2) the emergence of business process management; and (3) advances in the standards-based service-oriented infrastructures. This thesis focuses on this emerging three-layered architecture that builds on a service-oriented architecture framework, with a process layer that brings technology and business together, and a corporate performance layer that continually monitors and improves the performance indicators of global enterprises provides a novel framework for the business context in which to apply the important technical idea of service orientation and moves it from being an interesting tool for engineers to a vehicle for business managers to fundamentally improve their businesses
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