@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{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{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{GerkePetruchTamm2010, author = {Gerke, Kerstin and Petruch, Konstantin and Tamm, Gerrit}, title = {Continual Process Improvement Based on ITIL and Process Mining}, series = {Quality Management for IT-Services}, booktitle = {Quality Management for IT-Services}, editor = {Praeg, Claus-Peter}, publisher = {IGI Global}, address = {Hershey}, publisher = {SRH Berlin University of Applied Sciences}, pages = {145 -- 167}, year = {2010}, abstract = {The inherent quality of business processes and their support through information technology (IT) increasingly plays a significant role in the economic success of an organization. More and more business processes are supported through IT services. In order to provide IT services with the required quality and at minimum costs, the importance of effective and efficient IT service management (ITSM) processes is crucial.}, language = {en} } @article{TammPetruchBennemann2008, author = {Tamm, Gerrit and Petruch, Konstantin and Bennemann, Michael}, title = {SaaS - Software as a Service: Herausforderungen f{\"u}r IT-Abteilungen}, series = {Journal IM Information Management}, volume = {23}, journal = {Journal IM Information Management}, number = {4}, pages = {12 -- 18}, year = {2008}, abstract = {Das SaaS-Gesch{\"a}ftsmodell stellt IT-Abteilungen vor neue Herausforderungen und M{\"o}glichkeiten. IT-Abteilungen sind gefordert SaaS-Angebote in bestehende IT-Landschaften zu integrieren. Zudem k{\"o}nnen IT-Abteilungen selbst SaaS-Angebot bereitstellen und sich damit einen neuen Markt unternehmensintern und unternehmens{\"u}bergreifend erschließen. GobiT und ITIL k{\"o}nnen f{\"u}r die Steuerung des SaaS-Lieferanten- und Kundenbeziehungsmanagement und f{\"u}r die SaaS-Produktion sinnvoll eingesetzt werden.}, language = {de} } @inproceedings{GerkePetruchTamm2010, author = {Gerke, Kerstin and Petruch, Konstantin and Tamm, Gerrit}, title = {Optimization of Service Delivery through Continual Process Improvement: a Case Study}, series = {40. Jahrestagung der Gesellschaft f{\"u}r Informatik e.V. (GI), Leipzig}, booktitle = {40. Jahrestagung der Gesellschaft f{\"u}r Informatik e.V. (GI), Leipzig}, url = {http://nbn-resolving.de/urn:nbn:de:0298-opus4-6537}, year = {2010}, abstract = {In order to deliver services of high quality in a cost-effective manner, processes and their support through information technology (IT) play an increasingly significant role. We present an approach, which allows optimizing the service delivery through continual process improvement. This approach combines the 7-step improvement process recommended by ITIL with process mining. On the basis of suggestions derived from process mining, performance indicators of different services are determined and subsequently compared as part of an internal benchmark. The approach, which will be trialed in practice, enables the optimization of service delivery certainly, but it is also concerned with the most effective utilization of limited resources in terms of people and tools.}, language = {en} }