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Auflistung nach Schlagwort "Service-oriented architectures"

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  • Zeitschriftenartikel
    A Case for a New IT Ecosystem: On-The-Fly Computing
    (Business & Information Systems Engineering: Vol. 62, No. 6, 2020) Karl, Holger; Kundisch, Dennis; Meyer auf der Heide, Friedhelm; Wehrheim, Heike
    The complexity of development and deployment in today’s IT world is enormous. Despite the existence of so many pre-fabricated components, frameworks, cloud providers, etc., building IT systems still remains a major challenge and most likely overtaxes even a single ambitious developer. This results in spreading such development and deployment tasks over different team members with their own specialization. Nevertheless, not even highly competent IT personnel can easily succeed in developing and deploying a nontrivial application that comprises a multitude of different components running on different platforms (from frontend to backend). Current industry trends such as DevOps strive to keep development and deployment tasks tightly integrated. This, however, only partially addresses the underlying complexity of either of these two tasks. But would it not be desirable to simplify these tasks in the first place, enabling one person – maybe even a non-expert – to deal with all of them? Today’s approaches to the development and deployment of complex IT applications are not up to this challenge. “On-The-Fly Computing” offers an approach to tackle this challenge by providing complex IT services through largely automated configuration and execution. The configuration of such services is based on simple, flexibly combinable services that are provided by different software providers and traded in a market. This constitutes a highly relevant challenge for research in many branches of computer science, information systems, business administration, and economics. In this research note, it is analyzed which pieces of this new “On-The-Fly Computing” ecosystem already exist and where additional, often significant research efforts are necessary.
  • Zeitschriftenartikel
    Lieferantenportfolio-Management für IT-Services unter Berücksichtigung von Diversifikationseffekten
    (Wirtschaftsinformatik: Vol. 54, No. 2, 2012) Probst, Florian; Buhl, Hans Ulrich
    Serviceorientierte Architekturen ermöglichen, dass die IT-Unterstützung von Prozessen als Portfolio aus einzelnen IT-Services verschiedener Lieferanten entworfen werden kann. Die Gestaltung der Prozesse erfolgt dabei durch Auswahlentscheidungen zwischen potenziell einzubeziehenden IT-Services. Dabei wird in vielen Unternehmen in immer kürzeren Abständen eine Vielzahl von Anforderungen zur Investition in IT-Services formuliert. Allerdings übersteigt der Umfang der gewünschten Investitionen i. d. R. das zur Verfügung stehende Budget. Somit stehen Unternehmen vor der Herausforderung, das begrenzte Budget auf die Investitionen in die erfolgversprechendste Kombination aus IT-Services zu allokieren. Dies ist jedoch ohne methodische Unterstützung kaum möglich. Zudem erfolgt die Allokation oftmals intuitiv und in Abhängigkeit von der IT-Affinität der Entscheidungsträger. Deshalb wird ein quantitatives, mehrperiodiges Vorgehensmodell zur Maximierung des Unternehmenswertes im Sinne einer wertorientierten Unternehmensführung entwickelt, das die Abhängigkeiten der periodischen Auswahlentscheidungen berücksichtigt. Anschließend wird ein Entscheidungskalkül zur heuristischen Lösung des Auswahlproblems vorgestellt und die Anwendung an einem Fallbeispiel veranschaulicht.AbstractBy means of service-oriented architectures the IT support of processes can be designed as a portfolio of individual IT services provided by different suppliers. The processes are designed based on selection decisions between IT services that potentially have to be included. Many companies formulate a multitude of requirements for investments in IT services at ever shorter intervals. However, the scope of the desired investments usually exceeds the available budget. Thus, companies face the challenge of allocating the limited budget to investments in the most promising combination of IT services. This is hardly possible without methodical support. In addition, the allocation is often done intuitively and subject to the decision-makers’ affinity with IT. Therefore, this paper develops a quantitative, multi-period procedure model for the purpose of maximizing the enterprise value in accordance with value based management, which considers the dependencies of the periodical selection decisions. In the following, a decision logic for the heuristic solution to the selection problem is presented and its application is demonstrated by means of an illustrative case example.