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Conference Object Citation - Scopus: 2Cost Anaylsis of Interoperable Based E-Procurement System in the Republic of Turkey(Association for Computing Machinery, 2015) Imamoglu,M.Y.; Rehan,M.Approximately 15% of the government's Gross Domestic Products (GDP) is spent on public procurement [1]. Therefore, accountability and transparency in public procurement is very important. For the regulation of public expenditures and effective use of the budget, not only public procurements but also efficient use of infrastructure that make up the system for public procurements should be considered. As a result, the importance of the electronic procurement processes is emphasized in this thesis. Public Procurement Authority (PPA) and the State Procurement and Supply Office (SPSO) responsible for public tenders in the Republic of Turkey are two foundations affiliated to the Ministry of Finance. However, in public procurement, both institutions have their own system, own business processes and legal obligations. Yet is it a privilege to have two different systems? To find the answer to this question, interoperable based Public electronic Procurement (PeP) system and current PeP system are compared with the cost analysis study for the Republic of Turkey. © 2015 ACM.Conference Object Citation - Scopus: 27When To Automate Software Testing? Decision Support Based on System Dynamics: an Industrial Case Study(Association for Computing Machinery, 2014) Sahaf,Z.; Garousi,V.; Pfahl,D.; Irving,R.; Amannejad,Y.Software test processes are complex and costly. To reduce testing effort without compromising effectiveness and product quality, automation of test activities has been adopted as a popular approach in software industry. However, since test automation usually requires substantial upfront investments, automation is not always more cost-effective than manual testing. To support decision-makers in finding the optimal degree of test automation in a given project, we propose in this paper a simulation model using the System Dynamics (SD) modeling technique. With the help of the simulation model, we can evaluate the performance of test processes with varying degrees of automation of test activities and help testers choose the most optimal cases. As the case study, we describe how we used our simulation model in the context of an Action Research (AR) study conducted in collaboration with a software company in Calgary, Canada. The goal of the study was to investigate how the simulation model can help decision-makers decide whether and to what degree the company should automate their test processes. As a first step, we compared the performances of the current fully manual testing with several cases of partly automated testing as anticipated for implementation in the partner company. The development of the simulation model as well as the analysis of simulation results helped the partner company to get a deeper understanding of the strengths and weaknesses of their current test process and supported decision-makers in the cost effective planning of improvements of selected test activities. © 2014 ACM.Conference Object Citation - Scopus: 42Effort Estimation for Agile Software Development: Comparative Case Studies Using Cosmic Functional Size Measurement and Story Points(Association for Computing Machinery, 2017) Salmanoglu,M.; Hacaloglu,T.; Demirors,O.Agile methodologies have gained significant popularity among software development organizations during the last decade. Although agile methodologies are regarded as minimizing formal processes, they still utilize an estimation methodology for proper management. Story point is the most common input for agile effort estimation. Story point is an arbitrary measure; it reflects experiences of project participants. On the other hand, functional size is an alternative measure used in practice as an input for effort estimation. In this research, we collect and present the outcomes of three case studies which compared the effectiveness of COSMIC-based and story point based effort estimation in agile context. On selected projects of these organizations, software functional size was measured with COSMIC functional size measurement methodology. Effort prediction models were formed by using COSMIC size and actual effort spent; and the models were tested in terms of their effectiveness. The results show controversial outcomes. For all the cases, COSMIC based estimation was more precise. Therefore, COSMIC is an appropriate measure to estimate the effort in organizations that adopt agile software development. It is also observed that COSMIC allowed for computing productivity which has less disperse distribution than the productivity computed with SP. The data is also provided to help other researchers conduct their own studies. © 2017 Association for Computing Machinery.Conference Object Citation - Scopus: 1An Approach for Identifying the Likelihood of an Irregular Terrain Profile Being a Multipath Scattering Center in Emitter Localization(Association for Computing Machinery, 2017) Dalveren,Y.; Kara,A.In a single-receiver source localization scenario, pulses radiated from an emitting source (emitter) are reradiated from distributed points over the irregular terrain due to the diffuse scattering. Obviously, diffuse scattering may be occurred at anywhere over irregular terrains in dense scattering environments. Hence, a particular region from which the multipath pulses are scattered over the irregular terrain can be taken as a scattering center. In fact, a multipath scattering center may be approximated as multiple reflection points visible to the receiver. For this reason, an uncertainty in location of multipath scattering centers is expected. However, as proposed in this study, the likelihood of a particular region from which the multipath pulses are scattered may be identified if digital data of the irregular terrain, positions of the receiver and the transmitter, and Angle of Arrival (AOA) of the multipath are provided. In this context, this study attempts to provide an approach for identifying the likelihood of a particular region being a scattering center over the irregular terrain. To this end, Geometric Optics (GO)-based wave propagation principles are exploited to estimate path loss that would a basis for estimating likelihoods. Simulations are performed to illustrate the effectiveness of the proposed approach. This study aims to make significant contribution to an ongoing research on passive localization of radar emitters by exploiting multipath in dense scattering environments. © 2017 Association for Computing Machinery.Article Citation - Scopus: 6Exploring the Landscape of E-Government Maturity Models: Insights From Systematic Mapping Study and Comparative Analysis(Association for Computing Machinery, 2024) Okan,A.A.e-Government Maturity Models are essential tools for governments to assess and improve their e-government capabilities, performance, and impact. This article offers a pioneering systematic mapping study and comparative analysis of e-Government Maturity Models proposed between 2010 and 2022, marking a significant stride in the realm of e-government research. The review focuses on these recent models and compares their approaches, frameworks, and dimensions. Previous comparison research studies conducted before 2010 are also reviewed to provide an inclusive context for understanding the evolution and advancement of e-government maturity models. The study is the first to systematically map and compare e-Government Maturity Models proposed in recent years, also comparing with the previous decade.Employing a mixed-methods approach, this article meticulously dissects and contrasts various models, shedding light on the evolution, strengths, and weaknesses of e-government maturity frameworks over more than a decade. The research contributes to the literature by revealing underlying discrepancies in current models and proposing a synthesized perspective that integrates technological advancements and administrative strategies, providing insights into opportunities for future research and practice. The findings of the study can be used to develop a new generation of e-government maturity models that are more comprehensive and relevant to the current needs of governments. © 2024 Copyright held by the owner/author(s). Publication rights licensed to ACM.Conference Object Turkuaz: the Modernization of an Erp Application With Agile Methodology in the Automotive Sector in Turkey(Association for Computing Machinery, 2021) Senyurt,B.S.; Yuksel,H.B.; Asilsamanci,E.; Ozkil,A.Thanks to the increased computing power of processors, developers can develop more complex software applications. Software developers need to follow the software design life cycle to meet consistent high standard software output. The only constant component of software projects is human. The diversity of the teams leads to different understandings during the exchange of information and communication between the teams. Using the traditional method can create inefficient processes and lower quality products. In addition, code readability, code management becomes difficult, and technical debt increases as overtime. The Agile method provides flexibility and high efficiency to teams. Teams that adopt the agile method have advantages in interaction with the customer, in rapid response to changes, and in strong communication. This paper presents the modernization of the teams experiencing the difficulties of the traditional method with the agile method with a real case study. Within the scope of modernization, it has been worked on under three main headings: changing the module-based way of doing business, reducing technical borrowing and renewing distribution strategies. With this transformation, we are able to prioritize customer requests, measure the value of the business, constantly make useful parts available, easily maintain software, and allocate time for new ideas. © 2021 ACM.Conference Object Basic Issues in Forming a World-Class Supply Chain(Association for Computing Machinery, 2015) Akyuz,G.A.; Rehan,M.Supply chain management (SCM) practices in today's global, complex, networked and web-enabled business conditions demand world-class performance from all chain partners. This study addresses the basic issues in becoming a world-class supply chain. The main aspects involving people, process and technology dimensions are put forward and comprehensively discussed. It is revealed that along with the IT-based integrity issues and performance management aspects, managing the soft concepts such as 'leadership in an extended context' and 'trust-based relationships' appear as the keys for success. © 2015 ACM.
