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Featured researches published by Nico Brehm.


International Journal of Information Systems and Change Management | 2006

Change management issues in Federated ERP systems: an approach for identifying requirements and possible solutions

Sven Abels; Nico Brehm; Axel Hahn; Jorge Marx Gómez

In this paper, the domain of Federated Enterprise Resource Planning (FERP) systems is described. FERP systems consist of several service-oriented systems that implement the Enterprise Resource Planning (ERP) functionality in a distributed manner. Within this context, this paper focuses on challenges and requirements that arise when updating systems and changing their orchestration. This paper describes similarities to change management issues of conventional ERP systems and it describes emerging issues that appear when dealing with a distributed ERP system. Moreover, this paper introduces possible solutions in order to ease the process of changes.


International Journal of Information Technology and Management | 2010

Federated ERP-systems on the basis of Web Services and P2P networks

Nico Brehm; Jorge Marx Gómez

In the harsh competition between todays enterprises the use of business software systems plays an important role. Software systems integration of different enterprise sectors is one of the most commonly discussed topics and the implementation of a Service-Oriented Architecture (SOA) becomes more and more interesting not only for large companies but for Small and Medium-Sized Businesses (SMB) as well. This paper presents the approach of a Federated Enterprise Resource Planning (FERP) system on the basis of Web Services and Peer-to-Peer (P2P) networks as a first step towards vendor-independent ERP systems. In this work we propose a component-oriented system design and the application of the SOA paradigm. Furthermore, the distribution of ERP system components over P2P networks is considered. Finally we show an example business process and point out first evaluation activities.


business information systems | 2007

Web service-based specification and implementation of functional components in federated ERP-systems

Nico Brehm; Jorge Marx Gómez

ERP systems consist of many software components which provide specific functionality. However, these ERP systems are designed as an all-inone solution, often implementing functionality not needed. The paper presents the reference architecture of a federated ERP system which allows the distribution of ERP system components on the basis of Web Services and shows how these Web Services can be developed and provided by different software vendors. The architecture draws upon a hierarchical standardization model of data and service types. The model advances the reusability of data types and reduces the necessity of data transformation functions in business process descriptions. Furthermore the concrete architecture of a prototype implementation on the bases of open source software components is described.


Journal of Information Privacy and Security | 2005

Secure Web service-based resource sharing in ERP Networks

Nico Brehm; Jorge Marx Gómez

Abstract Enterprise Resource Planning (ERP) systems integrate operational application systems of different enterprise sectors. Logistics, human resource management and business accountancy are the most important components, the business Junctions of ERP systems can be assigned to. Besides the advantages of an integrated solution a number of disadvantages arise from the complexity of such systems. Particularly small- and medium-sized enterprises (SME) are affected by typical disadvantages like high operating- and maintenance costs which means that they cannot afford to buy and maintain an enterprise-wide integrated ERP system. A feasible opportunity to counter these problems is to develop a distributed (federated) system architecture based on loosely coupled components and their functions in order to partly reduce the complexity of the super-ordinate system. The presented paper describes the distribution of ERP systems on the basis of Web Services and gives a first proposal of a prototype. ERP system functions are distributed within a peer-to-peer architecture and are managed by different network nodes (providers). The major risks of this approach are connected to security problems which appear when confidential enterprise data is handled. A continuously automated function (service) integration from service discovery until service response processing increases the already existing risks. An important issue in this context is the consideration of trust relationships between service consumers and service providers. In our proposed solution security configurations based on XML policies are used to meet the security requirements of both communication partners in an open network.


business information systems | 2009

Using FERP Systems to Introduce Web Service-Based ERP Systems in Higher Education

Nico Brehm; Liane Haak; Dirk Peters

Enterprise Systems like Enterprise Resource Planning (ERP) systems are an important application area in higher education and getting more and more complex. Therefore problems occur from different perspectives and increase the difficulties in teaching. Existing software products cannot be used to teach specific technical aspects, like e.g. Web Services because it is still research in progress. This contribution reports about using a Federated ERP (FERP) system as an example for a Web Service-based ERP system to introduce aspects of Service Oriented Architectures (SOA) in higher education.


international conference on information and communication technologies | 2008

Ontologies supporting VLBAs; Semantic integration in the context of FERP

Liane Haak; Nico Brehm

One common goal in the area of very large business applications (VLBAs) is integration to achieve lean and efficient processes. In addition, semantic integration using ontologies is the next step to interoperability. In this paper we describe an approach how ontologies could support VLBAs. To clarify the problems and challenges we explain semantic integration in the context of the FERP systems.


Archive | 2007

Federated Enterprise Resource Planning Systems

Nico Brehm; Daniel Lübke; Jorge Marx Gómez


multikonferenz wirtschaftsinformatik | 2008

Toolunterstützung bei der vermarktungsorientierten Entwicklung von Web Services als Bausteine komplexer betrieblicher Anwendungssysteme .

Nico Brehm; Jorge Marx Gómez; Andreas Ziesenitz


Archive | 2007

Service-oriented Development of Federated ERP Systems

Nico Brehm; Jorge Marx Gómez


multikonferenz wirtschaftsinformatik | 2008

Das ERP-KMU-Dilemma und Anforderungen an Service-orientierte Architekturen zur Nutzung von Verbesserungspotentialen.

Nico Brehm; Nils Heyer; Jorge Marx Gómez; Boris Richter

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Liane Haak

University of Oldenburg

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Axel Hahn

University of Oldenburg

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Dirk Peters

University of Oldenburg

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Nils Heyer

Clausthal University of Technology

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Sven Abels

University of Oldenburg

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