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- ZeitschriftenartikelModel-Based Decision Support for the Customer-Specific Configuration of Value Bundles(Enterprise Modelling and Information Systems Architectures - An International Journal: Vol. 4, Nr. 1, 2009) Becker, Jörg; Beverungen, Daniel; Knackstedt, Ralf; Müller, OliverCustomers in B2B as well as B2C markets increasingly demand integrated problem solutions from their suppliers, comprising both physical artefacts (products) and services. Applying a mixed bundling strategy to offer such value bundles to customers foremost requires a sound configuration and economic calculation of value propositions, based on previously defined modules of products and services. In this paper, a modelling language is introduced to describe the function and structure of such modules, as well as to calculate the economic consequences of value propositions on a customer-individual level. The proposed modelling language has been embedded into a software tool to evaluate its utility regarding the customization and offering of integrated value bundles to customers.
- ZeitschriftenartikelA Survey of Service Identification Approaches - Classification Framework, State of the Art, and Comparison(Enterprise Modelling and Information Systems Architectures - An International Journal: Vol. 4, Nr. 2, 2009) Birkmeier, Dominik; Klöckner, Sebastian; Overhage, SvenDue to their modular nature, the adoption of Service Oriented Architectures (SOA) for business applications promises many advantages. The successful introduction of SOA depends on an efficient methodical support of the underlying new development paradigm, though. As the amount of current literature illustrates, especially the development of systematic methods for the identification of suitable services, which can serve as building blocks of business applications, is presently a focal point of interest. The different approaches presented in literature, however, significantly diverge with regard to their concepts and procedures. In this paper, we therefore analyse the current state of the art in service identification and highlight differences between the presented approaches. To evaluate proposed service identification approaches, we introduce a classification scheme with distinguishing factors. We use this scheme to compare and analyse the various approaches. Based on this comparison, we elaborate on individual strengths and weaknesses of approaches from which implications for practice are deduced. Finally, we identify areas of future research that remain to be addressed in order to further advance the state of the art in service identification.
- ZeitschriftenartikelSupporting Distributed Conceptual Modelling through Naming Conventions - A Tool-based Linguistic Approach(Enterprise Modelling and Information Systems Architectures - An International Journal: Vol. 4, Nr. 2, 2009) Delfmann, Patrick; Herwig, Sebastian; Lis, Łukasz; Stein, ArminEmpirical studies attest that conceptual models created in distributed modelling environments often vary heavily in the way their respective model elements are labelled. Although the same issues are being modelled, different names are chosen by the involved persons. By this, the analysis and comparison of the models, which is required for their subsequent integration, is extremely challenging and time consuming. Literature analysis reveals several approaches addressing this problem by either manually or semi-automatically integrating existing models after their construction. However, this proves to be an exhaustive and error prone task. In this article we propose a domain and modelling language independent approach that prevents the emergence of naming conflicts already during the modelling process. This is done by formalising naming conventions consisting of context specific thesauri and customised phrase structures, which are both derived from natural language grammars and supplemented by domain-specific terms. These conventions serve as basis for a fully automated guidance of the modeller during the model creation process, resulting in semantically comparable conceptual models. For this, we present a research prototype that integrates our approach into a modelling tool.
- ZeitschriftenartikelA Business Process Modelling Tool with Continuous Validation Support(Enterprise Modelling and Information Systems Architectures - An International Journal: Vol. 4, Nr. 2, 2009) Gruhn, Volker; Laue, Ralf; Kühne, Stefan; Kern, HeikoIn this article, we want to present the prototype of a modelling tool that applies graph-based rules for identifying problems in business process models. The advantage of our approach is twofold. Firstly, it is unnecessary to compute the complete state space of the model in order to find errors. Secondly, our technique can be applied to incomplete business process models. Thus, the modeller can be supported by direct feedback during the model construction. This feedback does not only report problems, but it also identifies their reasons and makes suggestions for improvement.
- ZeitschriftenartikelService Oriented Security Architecture(Enterprise Modelling and Information Systems Architectures - An International Journal: Vol. 4, Nr. 1, 2009) Opincaru, Cristian; Gheorghe, GabrielaAs Service Oriented Architectures (SOA) and Web services are becoming widely deployed, the issue of security is far from being solved. In an attempt to address this issue, the industry proposed several extensions to the SOAP protocol that currently reached different levels of standardization. However, no architectural guidelines have yet been proposed. In this paper we first outline the security challenges and the specifications that address these challenges and then present our concept the Service Oriented Security Architecture—SOSA. We argue that the different security functions (authentication, authorization, audit, etc.) should be realized as different stand-alone Web services These security services can then be chained together by means of Enterprise Application Integration (EAI) techniques such as message routing on Enterprise Services Buses (ESB). Next, we will present a prototypical implementation of this framework and describe our experiences so far. We show that by distributing the security functions, a more flexible architecture can be designed that would lower the costs associated with implementation, administration and maintenance.
- ZeitschriftenartikelEditorial(Enterprise Modelling and Information Systems Architectures - An International Journal: Vol. 4, Nr. 2, 2009) Frank, Ulrich
- ZeitschriftenartikelEditorial(Enterprise Modelling and Information Systems Architectures - An International Journal: Vol. 4, Nr. 1, 2009) Frank, Ulrich
- ZeitschriftenartikelDynamic Binding in a SOA and its Potential Implications on Compliance Verifications(Enterprise Modelling and Information Systems Architectures - An International Journal: Vol. 4, Nr. 2, 2009) Loosli, GabrielaAn essential characteristic of a Service Oriented Architecture (SOA) is binding at runtime. Different forms of this dynamic binding of services exist. When applying the most far reaching form, there is the risk that because of changes in the inventory of services inside the repository, non compliant services will be automatically selected at runtime. In this regard, non compliant means that not all required regulations are recognised and may therefore be violated. If services are reused in a different context, there are possibly additional regulations to be complied with. Current change management approaches which are based on testing all services and applications before going into production do not solve this problem. As a result, compliance can not be guaranteed in all cases. In this paper, we introduce an approach that seeks to avoid the selection of non compliant services by means of semantic concepts.
- ZeitschriftenartikelCompetency-Oriented Business Process Analysis - A Model-based Approach(Enterprise Modelling and Information Systems Architectures - An International Journal: Vol. 4, Nr. 1, 2009) Leyking, Katrina; Angeli, RalfTraditionally, business process analysis is primarily concerned with the identification of structural weaknesses, inefficient capacity utilisation or IT deficiencies. Despite this well-founded knowledge about process performance, and despite the increasingly recognized relevance of human capital for business performance, business process analysis efforts rarely touch human resources – except for downsizing or layoffs. The objective of this paper is to extend traditional business process modelling and business process simulation by competency requirements and their impact on process performance. By doing so, business process performance can be improved through the integration of competency requirements into process design. The approach addresses the need to derive competency requirements from business processes in order to facilitate the alignment of employee competency profiles with business roles (staffing) as well as the effective closure of business-relevant competency gaps through tailored learning processes (business-driven personnel development).
- ZeitschriftenartikelThe Difference Between Graph-Based and Block-Structured Business Process Modelling Languages(Enterprise Modelling and Information Systems Architectures - An International Journal: Vol. 4, Nr. 1, 2009) Kopp, Oliver; Martin, Daniel; Wutke, Daniel; Leyman, FrankThe most prominent business process notations in use today are BPMN, EPC and BPEL. While all those languages show similarities on the conceptual level and share similar constructs, the semantics of these constructs and even the intended use of the language itself are often quite different. As a result, users are uncertain when to use which language or construct in a particular language, especially when they have used another business process notation before. In this paper, we discuss the core characteristics of graph-based and block-structured modelling languages and compare them with respect to their join and loop semantics.