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Dive into the research topics where Gregor Zellner is active.

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Featured researches published by Gregor Zellner.


acm symposium on applied computing | 2006

Evaluation of current architecture frameworks

Susanne Leist; Gregor Zellner

With the growing importance of enterprise architecture the discussion about how to create or choose the right enterprise architecture framework for a specific organization arose quickly. But it is not only a question of choosing the right framework for describing or developing an enterprise architecture. It is more important to discover whether the chosen architecture framework meets the defined requirements or not. In this paper, we describe which requirements currently existing architecture frameworks should meet to constitute a useful procedure that enables to develop, describe and keep up an enterprise architecture. Our evaluation of current frameworks shows their lacks and identifies further improvement.


Business Process Management Journal | 2011

A structured evaluation of business process improvement approaches

Gregor Zellner

Purpose – The purpose of this paper is to provide a structured overview of so‐called business process improvement (BPI) approaches and their contribution to the actual act of improving. Even though a lot is said about BPI, there is still a lack of supporting the act of improving the process. Most approaches concentrate on what needs to be done before and after the improvement act, but the act of improving itself still seems to be a black box.Design/methodology/approach – This paper is mainly based on a review of literature that deals with the term “Business Process Improvement”. The analysis of the literature is supported by qualitative content analysis. The structure of the evaluation follows the mandatory elements of a method (MEM).Findings – A lot of literature and consulting approaches deal with the restructuring and improvement of business processes. The author finds that even so‐called BPI approaches do not describe the act of improvement itself. And if they do, they lack a methodological structure ...


Information Systems and E-business Management | 2009

The process map as an instrument to standardize processes: design and application at a financial service provider

Bernd Heinrich; Matthias Henneberger; Susanne Leist; Gregor Zellner

The standardization of processes and the identification of shared business services in a service-oriented architecture (SOA) are currently widely discussed. Above all in practice, however, there still is a lack of appropriate instruments to support these tasks. In this paper an approach for a process map is introduced which allows for a systematic presentation—as complete as possible—of the processes in an enterprise (division). After a consistent refinement of the process has taken place by means of aggregation/disaggregation respectively, generalization/specialization relations, it is possible to identify primarily functional similarities of the detailed sub-processes. The application of the process map at a financial service provider (FSP) highlights how these similarities can be taken as a basis to standardize processes and to identify shared services.


Information Systems and E-business Management | 2011

Six sigma as a business process management method in services: analysis of the key application problems

Florian Johannsen; Susanne Leist; Gregor Zellner

Apart from being applied in production, Six Sigma has grown considerably in importance as a business process management (BPM) method in services. The transfer of the method from production to service applications does, however, pose problems which affect the success of implementing Six Sigma as a BPM method in services. For a successful application of the Six Sigma method in services it is helpful to know these possible problems in order to be able to avoid them and to achieve the goals of Six Sigma improvement projects. In addition from a theoretical view knowing the problems is a first step for further development of the Six Sigma method. Therefore, the present article deals with the following questions: which key problems regarding the application of Six Sigma in services are mentioned in the literature and which phases of the Six Sigma cycle can they be assigned to? The existing literature on this subject is reviewed and a qualitative content analysis of its contents is presented. Additionally, a survey based on the problems found in the literature is conducted to compare theory and practice. The evaluation of the results shows, on the one hand, that to date the problems of the application of Six Sigma in services have little been dealt with. On the other hand the evaluation provides a survey of the problems structured in accordance to the phases of the Six Sigma cycle. Thus, the present paper offers new findings as regards the state-of-the-art of the Six Sigma method.


Wirtschaftsinformatik und Angewandte Informatik | 2008

Gestaltung hybrider Wertschöpfung mittels Architekturen – Analyse am Beispiel des Business Engineering

Gregor Zellner

ZusammenfassungMehr denn je sind Unternehmen im zunehmenden Wettbewerb dazu gezwungen, Differenzierungsstrategien zu etablieren. Die Generierung innovativer Leistungsbündel bestehend aus materiellen und immateriellen Leistungsbestandteilen ist eine solche Strategie und wird als „hybride Wertschöpfung“ bezeichnet. Um Unternehmen bei ihrer Veränderung zum hybriden Lösungsanbieter zu unterstützen, werden Vorgehensweisen und Techniken benötigt, welche in eine formgebende Struktur eingebettet sind. Architekturen sind solche Hilfsmittel, die eine strukturierte Veränderung von Unternehmen unterstützen können. Die Zielsetzung des Beitrags ist es zu identifizieren, welche Anforderungen an eine Architektur für hybride Wertschöpfung zu stellen sind und inwieweit die Architektur des St. Galler Business Engineering diese Anforderungen erfüllt.AbstractThe increasing competition forces enterprises to establish differentiation strategies more than ever. The creation of innovative bundles, consisting of material and immaterial elements, is such a strategy and known as “hybrid value creation”. In order to support enterprises during their change towards a hybrid solution supplier, procedures and techniques are needed which are embedded in a certain structure. Architecture Frameworks can support such a structured transformation of enterprises. The intention of the paper is to identify requirements for architectures for hybrid value creation and to check these requirements by using the St. Gallen Business Engineering Framework.


Electronic Markets | 2011

Service Integrators in business networks—the importance of relationship values

Bernd Heinrich; Gregor Zellner; Susanne Leist

To realise the potentials of CRM (customer relationship management), relationship-specific processes need to be designed and implemented in companies. This is all the more important and complicated in business networks where two or more actors collaborate to serve the customers. A good collaboration within business networks is the basis for understanding the customer process and identifying customer needs. But, even in these days of customer orientation, transaction orientation is still a matter of strong interest, and the following questions remain to be answered: What is the difference between relationship-oriented processes and transaction-oriented processes, and how can relationship-oriented processes be designed for a business network? The authors give first answers to both questions by using a systematic, goal-oriented specialisation of generic actions. To give an example, one relationship-oriented process will be designed and specified for a certain customer process in the course of this paper.


business process management | 2010

Implementing Six Sigma for Improving Business Processes at an Automotive Bank

Florian Johannsen; Susanne Leist; Gregor Zellner

Today, in the eyes of both customers and suppliers, product-related financial services take an eminent position. This does also apply to the automotive industry and its financial service providers (e.g. automotive banks). As a consequence, quality management and especially business process improvement methods (e.g. Six Sigma) attract growing attention in financial services. Above all, the Six Sigma approach is being increasingly discussed in both literature and practice. This chapter is the result of the prototypical implementation of Six Sigma at an automotive bank; the focus is on the selection and the combination of quality techniques used at an automotive bank which are the crucial points of the successful implementation.


Archive | 2002

Vorgehensmodell auf Prozessebene

Gregor Zellner

Der vorliegende Beitrag beschaftigt sich mit der Prozessebene, auf welcher innerhalb des Kompetenzzentrums fur Bankenarchitekturen im Informationszeitalter (CC BAI) in Zusammenarbeit mit mehreren Partnerunternehmen ein Referenzprozessmodell fur Banken im Bereich Vertrieb erstellt wurde. Der Schwerpunkt liegt zum einen auf dem Vorgehensmodell, wie es im CC BAI Anwendung gefunden hat und zum anderen auf dem Ubergang von der Geschaftsebene auf die Prozessebene im Sinne des klassischen Business Engineerings. Die Ergebnisse basieren hierbei sowohl auf bilateralen Arbeiten zwischen Mitgliedern des CC BAI und einzelnen Partnerunternehmen, als auch auf in gemeinschaftlichen Workshops erarbeiteten Inhalten.


Praxis Der Wirtschaftsinformatik | 2008

Identifizierung und Gestaltung neuer CRM-Prozesse

Gregor Zellner

ZusammenfassungDas Management von Kundenbeziehungen (Customer Relationship Management, CRM) stellt einen zentralen Erfolgsfaktor für Unternehmen dar. In diesem Zusammenhang ergeben sich u. a. folgende Problembereiche: Zum einen ist es notwendig, die relevanten Prozesse des Kundenbeziehungsmanagements zu identifizieren. Zum anderen ist es erforderlich, diese Prozesse an den jeweiligen Kundentyp anzupassen, um so ein effizientes Kundenbeziehungsmanagement zu ermöglichen. Der Beitrag greift diese Problembereiche auf und stellt einen Ansatz zur Identifizierung neuer, beziehungsorientierter Prozesse vor, der auf den Konstrukten »generische Aktivitäten«, »Kundenlebenszyklus« und »Kundenmotive« basiert. Am Beispiel des »aufgeklärten Kundentyps« wird der Rückgewinnungsprozess näher erläutert, und der im Beitrag vorgeschlagene Ansatz wird anhand eines Praxisbeispiels veranschaulicht. Die dargestellte Vorgehensweise ermöglicht es nicht nur — wie es häufig der Fall ist-, die Unternehmenssicht einzubeziehen, sondern auch die Kundensicht beim Management von Beziehungen zu berücksichtigen. Zudem wird gezeigt, wie generische Strukturen die Identifizierung von Abläufen unterstützen können und wie durch Spezialisierung der generischen Prozesse (auf einen bestimmten Kundentyp) konkrete Handlungsanweisungen abgeleitet werden können.


Archive | 2002

Qualitätssicherung im CC BAI

Reinhard Schütte; Gregor Zellner

Der vorliegende Beitrag beschaftigt sich mit dem Thema Qualitatssicherung, welches im Rahmen des CC BAI ebenenubergreifend betrachtet wurde. Die Zielsetzung bestand darin, die Konstruktion von Referenzmodellen einer Systematik zu unterwerfen, mit deren Hilfe eine Qualitat der erstellten Modelle „produziert“ werden sollte. Im vorliegenden Beitrag wird aufbauend auf einer Einfuhrung in die Thematik der Grundsatze ordnungsmassiger Referenzmodellierung die konkrete Anwendung des Frameworks auf die im CC BAI untersuchte Problematik von Informationsarchitekturen von Banken vorgestellt.

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Susanne Leist

University of Regensburg

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Bernd Heinrich

University of Regensburg

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Reinhard Schütte

University of Duisburg-Essen

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