@inproceedings{SchubertMautschStantchevetal.2013, author = {Schubert, Johannes and Mautsch, Erik and Stantchev, Vladimir and Tamm, Gerrit}, title = {Rechtliche Rahmenbedingungen f{\"u}r die Datenerhebung durch AAL-Infrastruktur bei der Pflege}, url = {http://nbn-resolving.de/urn:nbn:de:0298-opus4-2607}, pages = {5}, year = {2013}, abstract = {Bei der Datenerhebung und -verarbeitung durch AAL-Infrastruktur im Pflegesektor sind rechtliche Rahmenbedingungen zu pr{\"u}fen, die die Nutzung der Messdaten juristisch zul{\"a}ssig machen. Hierzu wurden die in der praxisnahen Pflegeliteratur dargestellten Rechtsnormen zusammengefasst und kategorisiert. Somit ließ sich ermitteln, welche Daten als sch{\"u}tzenswert zu definieren und mit welchen Sicherungsmaßnahmen zu versehen sind. Auf dieser Basis kann ein Ansatz pr{\"a}sentiert werden, der eine rechtlich unbedenkliche Absicherung aller technischen Elemente bei der Implementierung einer AAL-Infrastruktur in der Pflege erm{\"o}glicht.}, language = {de} } @article{Stantchev2009, author = {Stantchev, Vladimir}, title = {Wissen und Technologieaffinit{\"a}t: Herausforderungen bei der Realisierung eines ambienten Ver- und Entsorgungssystems f{\"u}r die Immobilien des Landes Berlin}, url = {http://nbn-resolving.de/urn:nbn:de:0298-opus4-2645}, pages = {335 -- 338}, year = {2009}, abstract = {Berlin ist eine der großen europ{\"a}ischen Hauptst{\"a}dte mit einem breiten Angebot an {\"o}ffentlichen Dienstleistungen (Public Services). 2003 hat der Berliner Senat den „Landesbetrieb f{\"u}r Geb{\"a}udebewirtschaftung" (LfG) gegr{\"u}ndet, der die Facility Management Aktivit{\"a}ten des Landes b{\"u}ndelt. Seit 2005 wird zusammen mit der TU Berlin der Einsatz innovativer Informations-technologien (IT) in diesem Bereich konsequent erweitert. Die Kombination aus einer unauff{\"a}lligen (unobtrusiven) IT-Infrastruktur und einer fl{\"a}chendeckenden und kontextbezogenen Einsetzbarkeit wird oft als ambient bezeichnet und stellt sehr spezifische Anforderungen an die Gestaltung der Mensch-Maschine-Interaktionen. In diesem Beitrag wird die Gestaltung eines Systems f{\"u}r die Ver- und Entsorgung als Teil der Facility Management Aufgaben beschrieben. Ausgehend von der Beschreibung unseres Vorgehensmodells zur Erhebung der Ist-Prozesse und Usability Evaluation, werden in einem zweiten Schritt Nutzerprofile erstellt und die Ist-Prozesse um diese erweitert. Die zweite H{\"a}lfte des Beitrags beschreibt das eingef{\"u}hrte, ambiente Ver- und Entsorgungssystem, zusammen mit einigen Interaktionsszenarien. Abschließend erfolgt eine Evaluierung der Wirtschaftlichkeit und der Usability des Systems.}, language = {de} } @incollection{StantchevStantcheva2012, author = {Stantchev, Vladimir and Stantcheva, Lubomira}, title = {Applying IT-Governance Frameworks for SOA and Cloud Governance}, series = {Communications in Computer and Information Science}, booktitle = {Communications in Computer and Information Science}, publisher = {SRH Berlin University of Applied Sciences}, pages = {398 -- 407}, year = {2012}, abstract = {Service-oriented architecture (SOA) in the enterprise was one of the key enablers for cloud computing. Therefore, it can serve as a natural fit for bringing traditional IT governance approaches forward to the challenges of cloud governance. In this work we present an approach for mapping IT governance mindsets to the aspects of SOA governance. It allows an IT organisation the adaptation and the continuous usage of already established governance models during the adoption of cloud computing solutions. We also present an application case study where we demonstrate the feasibility of the approach in real-life scenarios in the context of an international telecommunication provider.}, language = {en} } @incollection{StantchevTammPetruch2012, author = {Stantchev, Vladimir and Tamm, Gerrit and Petruch, Konstantin}, title = {Simulation-Based IT Process Governance}, series = {Communications in Computer and Information Science}, volume = {278}, booktitle = {Communications in Computer and Information Science}, editor = {Lytras, Miltiadis D.}, publisher = {Springer}, address = {Berlin}, publisher = {SRH Berlin University of Applied Sciences}, pages = {206 -- 215}, year = {2012}, abstract = {IT departments within enterprises often utilize incident management and ticketing systems. While performance data from such systems is often stored in logfiles it is rarely evaluated extensively. In this work we assess the applicability of an approach for extended evaluation of logged data from such systems. Our evaluation is focused on Key Performance Indicators (KPIs) and aims to discover more in-depth insights as compared to typical data visualization and dashboard techniques. We also present a practical case study where we demonstrate the feasibility of the approach using real-life logfiles from an international telecommunication provider. Our modeling methodology is based on the approach of System Dynamics.}, language = {en} } @article{StantchevTammPetruch2012, author = {Stantchev, Vladimir and Tamm, Gerrit and Petruch, Konstantin}, title = {Assessing and governing IT-staff behavior by performance-based simulation}, series = {Computers in Human Behavior}, volume = {29}, journal = {Computers in Human Behavior}, number = {2}, pages = {473 -- 485}, year = {2012}, abstract = {When optimizing IT operations organizations typically aim to optimize resource usage. In general, there are two kinds of IT resources - IT infrastructures and IT staff. An optimized utilization of these resources requires both quantitative and qualitative analysis. While IT infrastructures can offer raw data for such analyses, data about IT staff often requires additional preparation and augmentation. One source for IT staff-related data can be provided by incident management and ticketing systems. While performance data from such systems is often stored in logfiles it is rarely evaluated extensively. In this article we propose the usage of such data sources for IT staff behavior evaluation and also present the relevant augmentation techniques. We claim that our approach is able to provide more in-depth insights as compared to typical data visualization and dashboard techniques. Our modeling methodology is based on the approach of system dynamics. We also provide formal models and simulation results where we demonstrate the feasibility of the approach using real-life logfiles from an international telecommunication provider.}, language = {en} } @article{StantchevTamm2012, author = {Stantchev, Vladimir and Tamm, Gerrit}, title = {Reducing Information Asymmetry in Cloud Marketplaces}, series = {International Journal of Human Capital and Information Technology Professionals (IJHCITP)}, volume = {3}, journal = {International Journal of Human Capital and Information Technology Professionals (IJHCITP)}, number = {4}, pages = {1 -- 10}, year = {2012}, abstract = {Cloud Computing is emerging as a predominant paradigm for obtaining and providing computing functionality in the enterprise. Organizations that are planning to use cloud computing offerings struggle with the question "How do I choose the right offering?" Cloud offerings exhibit a variety of pricing models and different levels of service and functionality. In this article the authors define first Cloud Computing in the context of IT Governance. Then they set criteria to compare different offerings at the level of Software-as-a-Service (SaaS). This is an important precondition for the reduction of the verifiable information asymmetry and uncertainty in the cloud market. Besides deficiencies on the supply side, regarding configuration, display and communication of service bundles, the limited knowledge of potential buyers is main reason for the modest adoption. The authors apply strategies derived from information economics to reduce this asymmetry by integrating information substitutes in the service marketplace description, thereby transforming experience and credence qualities into search qualities.}, language = {en} } @article{StantchevMalek2011, author = {Stantchev, Vladimir and Malek, Miroslaw}, title = {Addressing Dependability throughout the SOA Life Cycle}, series = {IEEE Transactions on Services Computing}, volume = {4}, journal = {IEEE Transactions on Services Computing}, number = {2}, pages = {85 -- 95}, year = {2011}, abstract = {Dependability should be considered throughout the phases of the SOA life cycle. This article proposes the application of a service level management approach to address dependability and presents dependability-related activities for every stage (Model, Assemble, Deploy, and Manage) of the SOA life cycle. Furthermore, we describe the concepts and the formalisms that are behind these activities. Following these activities service providers and aggregators can offer optimized levels of dependability from their existing services and thus better meet user requirements.}, language = {en} } @article{PetruchTammStantchev2012, author = {Petruch, Konstantin and Tamm, Gerrit and Stantchev, Vladimir}, title = {Deriving In-Depth Knowledge from IT-Performance Data Simulations}, series = {International Journal of Knowledge Society Research (IJKSR)}, volume = {3}, journal = {International Journal of Knowledge Society Research (IJKSR)}, number = {2}, pages = {13 -- 29}, year = {2012}, abstract = {Knowledge of behavioral patterns of a system can contribute to an optimized management and governance of the same system, or of similar systems. While human experience often manifests itself as intuition, intuition can be notoriously misleading, particularly in the case of quantitative data and subtle relations between different data sets. This article augments managerial intuition with knowledge derived from a specific byproduct of automated transaction processing performance and log data of the processing software. More specifically, the authors consider data generated by incident management and ticketing systems within IT support departments. The authors' approach utilizes a rigorous analysis methodology based on System Dynamics. This allows for identifying real causalities and hidden dependencies between different datasets. The authors can then use them to derive and assemble knowledge bases for improved management and governance in this context. This approach is able to provide more in depth insights as compared to typical data visualization and dashboard techniques. In the experimental results section, the authors demonstrate the feasibility of the approach. It is applied on real life datasets and log files from an international telecommunication provider and considered different improvements in management and governance that result from it.}, language = {en} } @article{StantchevStantcheva2012, author = {Stantchev, Vladimir and Stantcheva, Lubomira}, title = {Extending Traditional IT-Governance Knowledge Towards SOA and Cloud Governance}, series = {International Journal of Knowledge Society Research}, volume = {3}, journal = {International Journal of Knowledge Society Research}, number = {2}, pages = {30 -- 43}, year = {2012}, abstract = {Enterprises today often strive to keep up with the paces of technological development. A particular case in point is the IT function where traditional governance approaches are often questioned by technology trends. Examples for such trends in the last ten years are the service-oriented architecture (SOA) and cloud computing. The introduction of SOA in the enterprise was one of the key enablers for cloud computing. Therefore, it can serve as a natural fit for bringing traditional IT governance approaches forward to the challenges of cloud governance. This article presents an approach for extending IT governance mindsets to the areas of SOA and cloud governance. It allows an IT organisation the adaptation and the continuous usage of already established governance knowledge and models during the adoption of cloud computing solutions. The authors also present an application case study where they demonstrate the feasibility of the approach in real-life scenarios in the context of an international telecommunication provider.}, language = {en} } @article{PetruchStantchevTamm2011, author = {Petruch, Konstantin and Stantchev, Vladimir and Tamm, Gerrit}, title = {A Survey on IT-Governance Aspects of Cloud Computing}, series = {International Journal of Web and Grid Services}, volume = {7}, journal = {International Journal of Web and Grid Services}, number = {3}, pages = {268 -- 303}, year = {2011}, abstract = {The purpose of this work is to provide a representative survey of current trends in the perception, assessment and adoption of cloud computing within the enterprise. Cloud computing can be regarded as the general principle for using and providing web and grid services. First, we provide a meta-study, where we evaluate existing and published empirical studies. Furthermore, we conduct and evaluate an own empirical study with a representative group of European and International enterprises. Key findings of the work include the significantly higher importance of Business Drivers for the adoption of cloud computing, as compared to Technical Drivers.}, language = {en} } @incollection{StantchevTamm2011, author = {Stantchev, Vladimir and Tamm, Gerrit}, title = {Addressing Non-Functional Properties of Services in IT Service Management}, series = {Non-Functional Properties in Service Oriented Architecture: Requirements, Models and Methods}, booktitle = {Non-Functional Properties in Service Oriented Architecture: Requirements, Models and Methods}, publisher = {IGI Global}, address = {Hershey}, publisher = {SRH Berlin University of Applied Sciences}, pages = {324 -- 334}, year = {2011}, abstract = {A key point that remains to be addressed is the assurance of service levels for end-user applications that rely on these provider models. This chapter describes an approach for addressing non-functional properties (NFPs) of services in service-oriented architectures (SOA). The approach is based on reference models such as the IT Infrastructure Library (ITIL) and the SOA life cycle model. It has been applied in several industrial settings in the telecommunications sector.}, language = {en} } @incollection{StantchevTamm2010, author = {Stantchev, Vladimir and Tamm, Gerrit}, title = {Managing Research Portfolios in the Knowledge Enterprise: a University Spin-Out Case Study}, series = {Organizational, Business, and Technological Aspects of the Knowledge Society}, booktitle = {Organizational, Business, and Technological Aspects of the Knowledge Society}, editor = {Lytras, Miltiadis D.}, publisher = {Springer}, address = {Berlin}, publisher = {SRH Berlin University of Applied Sciences}, pages = {418 -- 423}, year = {2010}, abstract = {Purely knowledge-based activities are of an increasing importance for modern enterprises. Moreover, innovative companies are focusing entirely on such high-profile activities and outsourcing the supporting tasks. In this work we focus on university spin-outs as an example. Such companies often enjoy the provision of administrative infrastructure (e.g., accounting, facilities) within an "incubator" area and can focus exclusively on innovation. The transfer of research ideas to the marketplace typically involves selection and targeted prioritization of these ideas. Project Portfolio Management (PPM) can be a viable framework for this prioritization. The necessary structuring of project ideas can be provided by a standardized process with defined functions (data repository, project assessment, selection, reporting, and portfolio reevaluation). While PPM is generally regarded as beneficial for large organizations, we show that similar benefits can be expected within innovative SMEs. In this work we discuss such benefits and related knowledge and learning strategies.}, language = {en} } @article{StantchevTamm2012, author = {Stantchev, Vladimir and Tamm, Gerrit}, title = {Reducing Information Asymmetry in Cloud Marketplaces}, series = {International Journal of Human Capital and Information Technology Professionals}, volume = {3}, journal = {International Journal of Human Capital and Information Technology Professionals}, number = {4}, pages = {1 -- 11}, year = {2012}, abstract = {Cloud Computing is emerging as a predominant paradigm for obtaining and providing computing functionality in the enterprise. Organizations that are planning to use cloud computing offerings struggle with the question "How do I choose the right offering?" Cloud offerings exhibit a variety of pricing models and different levels of service and functionality. In this article the authors define first Cloud Computing in the context of IT Governance. Then they set criteria to compare different offerings at the level of Software-as-a-Service (SaaS). This is an important precondition for the reduction of the verifiable information asymmetry and uncertainty in the cloud market. Besides deficiencies on the supply side, regarding configuration, display and communication of service bundles, the limited knowledge of potential buyers is main reason for the modest adoption. The authors apply strategies derived from information economics to reduce this asymmetry by integrating information substitutes in the service marketplace description, thereby transforming experience and credence qualities into search qualities.}, language = {en} }