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  • 1. Gustas, Remigijus
    A Basis for Interation within Enterprise Modelling1995Conference paper (Refereed)
  • 2.
    Gustas, Remigijus
    Karlstad University, Division for Information Technology.
    A Framework for Description of Pragmatic Dependencies and Inconsistency of Goals1996In: Proceedings of  the Second International Conference on the Design of Cooperative Systems, INRIA Institut National de Recherche en Informatique et en Automatique , 1996, p. 625-643Conference paper (Refereed)
  • 3.
    Gustas, Remigijus
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Information Systems and Project Management.
    A Look Behind Conceptual Modeling Constructs in Information System Analysis and Design2010In: International Journal of Information System Modeling and Design, ISSN 1947-8186, E-ISSN 1947-8194, Vol. 1, no 1, p. 79-108Article in journal (Refereed)
    Abstract [en]

    Information systems can be conceptualized in a number of ways. Most methodologies propose to analyze separately process and data semantics by projecting them into totally different diagram types. This system analysis and design tradition is very strong in most modeling approaches such as structured analysis as well as object-oriented design. Structural and behavioral aspects are complementary. They cannot be analyzed in isolation. Lack of a conceptual modeling approach, which can be used for verification of semantic integrity among various types of diagrams, is the cornerstone of frustration for information system architects. Inconsistency, incompleteness and ambiguity of conceptual views create difficulties in verification and validation of technical system architectures by business experts, who determine the organizational strategies. Consequently, the traditional information system methodologies are not able to bridge a communication gap among business experts and IT-system designers. Various interpretations of semantic relations in conceptual modeling approaches make the system analysis and design process more art than science. It creates difficulties to formulate comprehensible principles of decomposition and separation of concerns. Unambiguous definition of aggregation and generalization is necessary for breaking down information system functionality into coherent non-over¬lapping components. This paper concentrates on conceptual modeling enhancements, which help to avoid semantic integrity problems in conceptualizations on various levels of abstraction. The presented conceptual modeling approach is based on a single type of diagram, which can be used for reasoning on semantic integrity between business process and data across organizational and technical system boundaries.

  • 4.
    Gustas, Remigijus
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Information Systems and Project Management.
    A New Paradigm for System Analysis and Design2008Conference paper (Refereed)
  • 5.
    Gustas, Remigijus
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Information Systems and Project Management.
    Analys av affärsprocesser utifrån begreppet koherens - exempel från en fallstudie inom skogsindustrin2000In: Om metoder för systemutveckling i professionella organisationer / [ed] A G, Nilsson. J S, Pettersson, Lund: Studentlitteratur , 2000, p. 278-300Chapter in book (Refereed)
    Abstract [en]

    Vi ska i detta kapitel presentera ett integrerat ramverk för verksamhetsmodellering med tillhörande koherensanalys. I en koherensanalys undersöks sambandet mellan ett systems kommunikationsflöde med omgivningen och dess interna tillståndsförändringar. Ram¬verket fokuserar på modellering av statiska och dynamiska aspekter, där flera aktörer samverkar för att uppnå sina mål. Integration av olika beroenden har en framträdande plats i den föreslagna ansatsen för verksamhetsmodellering. I denna ansats kan vi visa hur statiska och dynamiska processdiagram kan föras samman och hur insikter från olika målsättningsperspektiv kan kombineras. Syftet är att introducera nya principer för integration av olika ansatser till analys av informationssystem. Principerna är användbara för att kontrollera koherens eller samstämmighet mellan semantiska diagram. Det presenterade ramverket illustreras av en fallstudie från skogsindustrin

  • 6. Gustas, Remigijus
    Bridging Enterprise Modelling to EUROMETHOD1995In: Informatica, ISSN 0868-4952, 1822-8844, Vol. 6, no 4, p. 457-482Article in journal (Refereed)
  • 7.
    Gustas, Remigijus
    Karlstad University, Division for Information Technology.
    Business process analysis using the coherence concept: an example from a forest industry case2001In: On Methods for Systems Development in Professional Organisations: The Karlstad University Approach to Information Systems and its Role in Society / [ed] Nilsson, AG & Pettersson, JS, Lund: Studentlitteratur , 2001, p. 284-306Chapter in book (Refereed)
    Abstract [en]

    The main result of this chapter is an integrated framework of enterprise modelling and its coherence analysis. In a coherence analysis we investigate the relationship between system communication flows and internal state changes. The framework focuses on the modelling of static and behavioural aspects, where several actors co-operate to achieve their goals. Integration of various dependencies lies in the foreground of the suggested enterprise modelling approach. In this approach, we can show how to bring together static and dynamic diagrams of processes and to combine insights from the point of view of different goals. The ultimate goal is to introduce new principles for integration of various approaches in information system analysis. These principles are useful to check coherence of semantic diagrams. The presented framework is illustrated by examples from a case study in the forest industry

  • 8.
    Gustas, Remigijus
    Karlstad University, Division for Information Technology.
    Communication Action as an Integrating Dynamic Relationship of Enterprise Modelling1998In: The language action perspective on communication modelling: proceedings of the third international workshop / [ed] Goldkuhl, G. Lind, M. and Seigerroth, U., Jönköping: Jönköping International Business School , 1998, p. 115-130Conference paper (Refereed)
    Abstract [en]

    The focus of this paper is on the modelling primitives which are not only taking into account semantic models of traditional approaches for information system development, but also put a communication aspect into the foreground of system analysis. Integration of static, dynamic and non-traditional communication dependencies is considered as a most important feature of the suggested framework. In this paper is presented an integrated set of the basic semantic modelling primitives that is adequate to analyse the static and dynamic aspects of business processes. It is useful for the purpose of understanding and reasoning about information systems at the enterprise modelling level

  • 9.
    Gustas, Remigijus
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Information Systems and Project Management.
    Conceptual Modeling and Integration of Static and Dynamic Aspects of Service Architectures2010In: Ontology, Conceptualization and Epistemology for Information Systems, Software Engineering and Service Science: 4th International Workshop, ONTOSE 2010, held at CAiSE 2010, Hammamet, Tunisia, June 7-8, 2010, Revised Selected Papers, Springer , 2010, p. 17-32Conference paper (Refereed)
    Abstract [en]

    The concept of service is comprehensible in various domains and it can be used for integrated modeling of business process and business data. Service-oriented modeling approach, which is presented in this paper, is based on a single type of diagram. It helps to reason about semantic integrity of different modeling dimensions across organizational and technical system boundaries. A well-known case study is analyzed to demonstrate how service interactions among enterprise organizational components can be represented for detecting the essential similarities and differences of business processes. The ultimate goal of this paper is to overview deficiencies of conventional modeling approaches and to present generic principles for computation neutral modeling of service architectures. Conceptual models of service interactions between organizational and technical components enable separation of crosscutting concerns in enterprise engineering without requirement to specify a complete solution. However, most information system methodologies are projecting the structural, interactive and behavioral aspects into totally different modeling dimensions. If service architectures are represented as loose collection of models, it is difficult to detect integrity problems of various diagrams

  • 10. Gustas, Remigijus
    Defining visions in context: Models, processes and tools for requirements engineering1996In: Information Systems, ISSN 0306-4379, Vol. 21, no 6, p. 515-547Article in journal (Refereed)
    Abstract [en]

    Requirements Engineering is an ill-defined, but growing area of research which addresses a critical problem, that of designing the right thing. This paper reports research on the ESPRIT project NATURE (Novel Theories Underlying Requirements Engineering). A framework for RE research is introduced which covers overall conceptions of the modelling and process views of requirements engineering. Within this framework, current modelling techniques can be reused but are augmented by generic models supporting the reuse of domain knowledge for requirements analysis and validation, and by an enterprise modelling structure emphasising the role of user objectives in requirements engineering. The basic understanding of RE as establishing visions in context leads into the NATURE process model that formalises RE activities as freely composable process chunks linked to contexts. The process model is then used to develop roadmaps of pathways for RE activities within the enterprise model structure. This structure also requires a broader definition of viewpoints and their resolution in the RE process. The last part of the paper presents the NATURE Computer Aided Requirements Engineering (CARE) environment, integrated via the ConceptBase repository. It comprises tools for viewpoint and repository management, process guidance, traceability support, and matching tools for reuse, viewpoint integration and validation using similarity and analogical reasoning mechanisms. The tools section also reports critiquing and validation facilities, and schema integration tools. The paper concludes with a review of related work in conceptual modelling and other aspects of Requirements Engineering.

  • 11.
    Gustas, Remigijus
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Information Systems and Project Management.
    Enterprise Models to Analyse Completeness and Integrity of Semantic Representations1998Conference paper (Refereed)
  • 12. Gustas, Remigijus
    From Conceptual to Business Modeling1994Conference paper (Refereed)
  • 13. Gustas, Remigijus
    Hierarchical System of Coding and Decoding1979Report (Other academic)
  • 14.
    Gustas, Remigijus
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Information Systems and Project Management.
    Integrated Approach for Information System Analysis at the Enterprise Level2000In: Enterprise Information Systems: Part I / [ed] Joaquim Filipe, Springer, 2000, p. 81-88Conference paper (Refereed)
  • 15.
    Gustas, Remigijus
    Karlstad University, Division for Information Technology.
    Integrated Approach for Modelling of Semantic and Pragmatic Dependencies of Information Systems1998In: Conceptual Modeling – ER ’98: 17th International Conference on Conceptual Modeling, Singapore, November 16-19, 1998. Proceedings, Springer, 1998, p. 121-134Conference paper (Refereed)
  • 16.
    Gustas, Remigijus
    Karlstad University, Division for Information Technology.
    Integrated framework for Information System Analysis1998Conference paper (Refereed)
  • 17.
    Gustas, Remigijus
    Karlstad University, Division for Information Technology.
    Integration of Interactive, Behavioral and Structural Aspects of Conceptual Models2010In: The Practice of Enterprise Modeling: Third IFIP WG 8.1 Working Conference, PoEM 2010, Delft, The Netherlands, November 9-10, 2010. Proceedings, Springer, 2010, p. 217-231Conference paper (Refereed)
    Abstract [en]

    Conceptual modeling is an essential part of enterprise engineering activity. Unfortunately, enterprise modeling methods are projecting interactive, behavioral and structural dimensions of conceptualizations into totally different diagram types. If static and dynamic aspects are analyzed separately, they are more difficult to visualize and to understand for stakeholders. Moreover, in the traditional approaches, there is a paradigmatic mismatch among different enter-prise architecture modeling dimensions. Analysis of interplay among interactions, state changes and object creation/termination effects is necessary for un-derstanding integrity problems of conceptualizations. The goal of this paper is to present a modeling approach for semantic integration of static and dynamic views of conceptual models. The presented modeling method can be used for separation of crosscutting concerns of computation neutral specifications

  • 18. Gustas, Remigijus
    Knowledge Representation Method for Information System Analysis and Synthesis1986Doctoral thesis, monograph (Other academic)
  • 19.
    Gustas, Remigijus
    Karlstad University, Faculty of Arts and Social Sciences (starting 2013), Karlstad Business School.
    Modeling approach for integration and evolution of information system conceptualizations2013In: Frameworks for Developing Efficient Information Systems: Models, Theory, and Practice, IGI Global, 2013, 1Chapter in book (Other academic)
    Abstract [en]

    Most information systems development methodologies are based on conceptual modeling of static and dynamic views, which are represented by totally different types of diagrams. Understanding of the interplay among interactive, behavioral and structural aspects of specifications is necessary for identification of semantic integrity problems between business process and business data. Typically, semantic inconsistencies and discontinuities between collections of conceptual representations are not easy to detect and to comprehend for information system designers due to static and dynamic aspects of models being visualized in isolation. The goal of this paper is to present a modeling approach for semantic integration and evolution of static and dynamic aspects of conceptual models. Visualization of interplay among structural, interactive and behavioral aspects of computation-neutral representations helps to understand crosscutting concerns and integrity problems of information system conceptualizations. The main advantage of the presented conceptual modeling approach is stability and flexibility of diagrams in dealing with the evolutionary changes of requirements. Therefore, the developed modeling foundation is targeted to both business managers and information system designers for the purpose of computation-neutral integration and evolution of information systems specifications.

  • 20.
    Gustas, Remigijus
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT. Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Information Systems and Project Management.
    Modeling Approach for Integration and Evolution of Information System Conceptualizations2011In: International Journal of Information System Modeling and Design, ISSN 1947-8186, E-ISSN 1947-8194, Vol. 2, no 1, p. 45-73Article in journal (Refereed)
    Abstract [en]

    Most conventional conceptual modeling approaches are not putting into a foreground interaction dependencies between actors. This is one of the main reasons why it is difficult to apply them for managing complexity of conceptual representations. The goal of this paper is to present conceptual modeling method, which allows constructing graphical representations of scenarios with a more comprehensible structure. Using simple interaction loops between organizational and technical components help designers to separate crosscutting concerns in system engineering without the requirement to specify a complete solution. The examples of sequential, iterative, parallel and alternative behavior are analyzed to demonstrate conceptual descriptions of use-case scenarios. The overlaying and underlying interaction loops among actors are easier to understand, extend and maintain.

  • 21. Gustas, Remigijus
    On Related Pragmatic Categories and Dependencies within Enterprise Modelling1995Conference paper (Refereed)
  • 22.
    Gustas, Remigijus
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT. Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Information Systems and Project Management.
    Overlaying Conceptualizations for Managing Complexity of Scenario Specifications2011In: Enterprise, Business-Process and Information Systems Modeling: Proceedings of 12th International Conference, BPMDS 2011, and 16th International Conference, EMMSAD 2011, held at CAiSE 2011, London, UK, June 20-21, 2011 / [ed] Terry Halpin, Selmin Nurcan, John Krogstie, Pnina Soffer, Erik Proper, Rainer Schmidt, Ilia Bider, Springer Berlin/Heidelberg, 2011, p. 398-412Conference paper (Refereed)
    Abstract [en]

    Most conventional conceptual modeling approaches are not putting into a foreground interaction dependencies between actors. This is one of the main reasons why it is difficult to apply them for managing complexity of conceptual representations. The goal of this paper is to present conceptual modeling method, which allows constructing graphical representations of scenarios with a more comprehensible structure. Using simple interaction loops between organizational and technical components help designers to separate crosscutting concerns in system engineering without the requirement to specify a complete solution. The examples of sequential, iterative, parallel and alternative behavior are analyzed to demonstrate conceptual descriptions of use-case scenarios. The overlaying and underlying interaction loops among actors are easier to understand, extend and maintain.

  • 23.
    Gustas, Remigijus
    Karlstad University, Division for Information Technology.
    Quality Analysis of Enterprise Modelling1999Conference paper (Refereed)
  • 24.
    Gustas, Remigijus
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Information Systems and Project Management.
    Semantic and Pragmatic Dependencies of Information Systems1997Book (Refereed)
  • 25.
    Gustas, Remigijus
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Information Systems and Project Management.
    Semantic Integration in Conceptual Modeling of Service Architectures2007In: Multi-, Inter- and Trans-disciplinary Issues in Computer Science and Engineering, p. 3-6Article in journal (Refereed)
  • 26.
    Gustas, Remigijus
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Information Systems and Project Management.
    Semantic Structure of Formalised Technological Processes1986In: Analysis and Synthesis of Management Systems, Vilnius: Vilnius , 1986, p. 88-96Chapter in book (Refereed)
  • 27. Gustas, Remigijus
    Structuring of Concepts in an Organisational System1984Conference paper (Refereed)
  • 28. Gustas, Remigijus
    The Framework for Description of Goal Dependencies1995In: Information Technology and Control, Vol. 1, no 1, p. 44-54Article in journal (Refereed)
  • 29. Gustas, Remigijus
    The Framework for Specification of Conceptual Constraints in Data Engineering1993In: Constraint programming: [proceedings of the NATO Advanced Study Institute on Constraint Programming, held in Pärnu, Estonia, August 13-24, 1993] / [ed] Mayoh, Penjam, Tyugu, Springer, 1993, p. 97-120Conference paper (Refereed)
  • 30.
    Gustas, Remigijus
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Information Systems and Project Management.
    Towards a Communication based approach for Enterprise Modelling Integration2000Conference paper (Refereed)
  • 31. Gustas, Remigijus
    Towards Foundationms of Database Schema Independent Modelling of Concepts1994In: East/West Database Workshop: Proceedings of the Second International East/West Database Workshop, Klagenfurt, Austria, 25–28 September 1994 / [ed] J.Eder, L.Kalinichenko, Springer, 1994, p. 275-288Conference paper (Refereed)
  • 32. Gustas, Remigijus
    Towards the Generic Action Modelling Framework1997In: Proc. of the 1st International Workshop on the Many Facets of Process Engineering, 1997, p. 107-121Conference paper (Refereed)
  • 33. Gustas, Remigijus
    Towards Understanding and Formal Definition of Conceptual Constraints1995In: Information Modelling and Knowledge Basis VI / [ed] Hannu Kangassalo, Hannu Jaakkola, Setsuo Ohsuga, Bengt Wangler, IOS press , 1995, p. 379-388Chapter in book (Refereed)
  • 34.
    Gustas, Remigijus
    University of Karlstad.
    Viability criterion to analyse the pragmatic quality of requirements1997Conference paper (Refereed)
  • 35.
    Gustas, Remigijus
    et al.
    Karlstad University, Faculty of Arts and Social Sciences (starting 2013), Karlstad Business School (from 2013).
    Benson, Vladlena
    University West London, London, England.
    Data Privacy, Security and Piracy2017In: International Journal of Information System Modeling and Design, ISSN 1947-8186, E-ISSN 1947-8194, Vol. 8, no 4, p. VI-VIArticle in journal (Other academic)
  • 36. Gustas, Remigijus
    et al.
    Bubenko, J
    Wrangler, B
    Goal Driven Enterprise Modelling: Bridging Pragmatic and Semantic Descriptions of Information Systems1996In: Information Modelling and Knowledge Basis VII, IOS Press , 1996, p. 73-91Chapter in book (Refereed)
  • 37.
    Gustas, Remigijus
    et al.
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Centre for HumanIT. Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Information Systems and Project Management.
    Gustiene, Prima
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Information Systems and Project Management.
    A Graphical Method for Conceptual Modelling of Business and Software Scenarios2012In: New Trends in Software Methodolodies, Tools and Techniques / [ed] Hamido Fujita and Roberto Revetria, Amsterdam: IOS Press, 2012, p. 238-253Conference paper (Refereed)
    Abstract [en]

    Abstract. Modelling method, which is defined by simple interaction loops between organizational and technical components can be viewed as fundamental elements for decomposition of complex business scenarios. This is important for separation of crosscutting concerns. The paper proposes a new graphical method that allows limited human mind to focus and to visualize one particular concern at a time. It also suggests design principles for the semantic integration of business and software scenarios. Separation of crosscutting concerns is performed on a basis of the standard transaction pattern. The presented modelling method can be used for introducing the evolutionary changes of requirements. This is important for managing complexity of information systems conceptualizations, especially when new changes are introduced.  It targets both business process modelling experts and information system designers. The ultimate goal of the new method is to construct and visualize business scenarios with a more comprehensible structure.

    Keywords. Service interactions, value flows, separation of concerns, cancellation patterns.

  • 38.
    Gustas, Remigijus
    et al.
    Karlstad University, Division for Information Technology.
    Gustiene, Prima
    Karlstad University, Division for Information Technology.
    Extending Lyee Methodology using the Enterprise Modelling Approach2002In: Frontiers in Artificial Intelligence and Applications, ISSN 0922-6389, E-ISSN 1879-8314, Vol. 84, p. 273-288Article in journal (Refereed)
  • 39.
    Gustas, Remigijus
    et al.
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Information Systems and Project Management.
    Gustiene, Prima
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Information Systems and Project Management.
    Service-Oriented Foundation and Analysis Patterns for Conceptual Modeling of Information Systems2009In: Information Systems Development: Challenges in Practice, Theory, and Education. Volume 1 / [ed] Wita Wojtkowski, Gregory Wojtkowski, Michael Lang, Kieran Conboy, Chris Barry, New York: Springer , 2009, p. 249-265Chapter in book (Refereed)
    Abstract [en]

    Everyday companies are inventing new configurations of service architectures, which prescribe and motivate information system design. Information system architectures are intrinsically complex engineering products that can be defined on different levels of abstrac-tion and represented by using various dimensions. Designers are building them fragment by fragment but when the design is complete, then typically the business and technical compo-nents do not fit each other. The attempt to maintain the relevance of each specification frag-ment across disparate dimensions is very expensive and time consuming. The notion of service is not used explicitly in traditional information system engineering methods, which cover just a part of required modelling notations that are currently emerging under the service - oriented analysis and design approaches. The most fascinating idea about the service concept is that it applies equally well to organizational as well as technical components, which can be viewed as service requestors and service providers. The primary goal of service oriented architecture is to align the business process models with the information system design in order to make both organizational and technical system parts more effective. One of the reasons why the traditional methods do not provide effective support for engineering of information systems is that service architectures are difficult to visualize and comprehend for business experts who determine the organizational strategies. The main goal of this paper is to present a new ser-vice-oriented foundation and the associated analysis patterns for computation neutral informa-tion system modelling. A service concept integrates various information system dimensions of static and dynamic aspects into one modelling notation

  • 40.
    Gustas, Remigijus
    et al.
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Information Systems and Project Management.
    Gustiene, Prima
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Information Systems and Project Management.
    Service-Oriented Foundation and Analysis Patterns for Conceptual Modelling of Information Systems2007In: Information Systems Development. Challenges in Practice, Theory and Education: Volume I / [ed] Wita Wojtkowski, Gregory Wojtkowski, Michael Lang, Kieran Conboy, Chris Barry, New York: Springer, 2007, p. 249-265Conference paper (Refereed)
  • 41.
    Gustas, Remigijus
    et al.
    Karlstad University, Faculty of Arts and Social Sciences (starting 2013), Karlstad Business School.
    Gustiene, Prima
    Karlstad University, Faculty of Arts and Social Sciences (starting 2013), Karlstad Business School.
    Three Conceptual Modeling Patterns of Semantically Integrated Method2014In: BUSTECH 2014, The Fourth International Conference on Business Intelligence and Technology, IARIA , 2014Conference paper (Refereed)
    Abstract [en]

    System modeling patterns are similar to workflow patterns, which were established with the purpose of delineating the requirements that arise during business process modeling on a recurring basis. Traditionally, only dynamic aspects are used for specification of modeling patterns leaving aside the static aspects of business processes. The paper presents three conceptual modeling patterns where integrity of totally different aspects can be analyzed. The advantage of such a modeling approach is that it enables visualization and integration of different modeling dimensions of information system specifications in a single diagram. Many graphical representations do not allow such a visualization and an integration of static and dynamic aspects.

  • 42.
    Gustas, Remigijus
    et al.
    Karlstad University, Division for Information Technology.
    Gustiene, Prima
    Karlstad University, Division for Information Technology.
    Towards the Enterprise Engineering Approach for Information System Modelling across Organizational and Technical System Boundaries2004In: Enterprise Information Systems V / [ed] O.Camp, S. Hammoudi & M.Piattini, Dordrecht: Kluwer , 2004, Vol. 5, p. 235-252Chapter in book (Other academic)
  • 43.
    Gustas, Remigijus
    et al.
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Information Systems and Project Management.
    Gustiené, Prima
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Information Systems and Project Management.
    A method for conceptual modeling of semantically integrated use-case scenarios2011In: Building the e-World Ecosystem / [ed] Skersys, T; Butleris, R; Nemuraite, L; et al., Springer , 2011, p. 138-152Conference paper (Refereed)
  • 44.
    Gustas, Remigijus
    et al.
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Information Systems and Project Management.
    Gustiené, Prima
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Information Systems and Project Management.
    A New Method for Conceptual Modelling of Information Systems2009In: Information Systems Development: Towards a Service Provision Society / [ed] G.A Papadopoulos, W. Wojtkowski, W.G Wojtkowski, S. Wrycza & J. Zupancic, New York: Springer , 2009, p. 157-166Conference paper (Refereed)
  • 45.
    Gustas, Remigijus
    et al.
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Information Systems and Project Management.
    Gustiené, Prima
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Information Systems and Project Management.
    Conceptual Modeling Method for Separation of Concerns and Integration of Structure and Behavior2012In: International Journal of Information System Modeling and Design, ISSN 1947-8186, E-ISSN 1947-8194, Vol. 3, no 1, p. 48-77Article in journal (Refereed)
    Abstract [en]

    Identification of discontinuities, separation of concerns and dealing with the evolutionary changes of requirements is difficult in conceptual modeling. Another restriction is that a limited human mind allows focusing on one particular requirement at a time in isolation. One fundamental problem is that all conventional conceptual modeling techniques are dealing with collections of loosely linked meta-models, which are defined by the different types of diagrams. Typically, system development methods project interactive, behavioral and structural aspects of information systems’ conceptual representations into disparate views. Therefore, the semantic integrity of various architecture dimensions is difficult to achieve. The difficulties are stemming from the paradigmatic mismatch between static and dynamic constructs. The advantage of the conceptual modeling approach presented in this paper is flexibility in dealing with the evolutionary changes of requirements. Visualization of interplay among structural, interactive and behavioral aspects helps to separate different concerns and to identify discontinuities of conceptual representations. It is demonstrated by case study examples that sequential, underlying, enclosing, overriding and overlaying interaction loops between actors provide the foundation for the composition of complex scenarios, which span across organizational and technical system boundaries. The presented semantic integration and system decomposition principles target both business process modeling experts and information system designers, because they are essential for introducing evolutionary changes and for managing complexity of information system conceptualizations.

  • 46.
    Gustas, Remigijus
    et al.
    Karlstad University, Faculty of Arts and Social Sciences (starting 2013), Karlstad Business School.
    Gustiené, Prima
    Karlstad University, Faculty of Arts and Social Sciences (starting 2013), Karlstad Business School.
    Conceptual Modeling Patterns of Business Processes2014In: International Journal on Advances in Intelligent Systems, ISSN 1942-2679, E-ISSN 1942-2679, Vol. 7, no 4, p. 716-727Article in journal (Refereed)
    Abstract [en]

    System modeling patterns are similar to workflow patterns, which were established with the purpose of delineating the requirements that arise during business process modeling on a recurring basis. Traditionally, only dynamic aspects are used for the specification of modeling patterns leaving aside the static aspects of business processes. The paper presents the conceptual modeling patterns where integrity of totally different aspects can be analyzed. The advantage of such a modeling approach is that it enables visualization and integration of different modeling dimensions of information system specifications using a single diagram. Many graphical representations do not allow such visualization and integration of static and dynamic aspects. We also represent graphically interpretation of the conversation for action schema by constructs of our semantically integrated conceptual modeling method.

  • 47.
    Gustas, Remigijus
    et al.
    Karlstad University, Faculty of Arts and Social Sciences (starting 2013), Karlstad Business School (from 2013).
    Gustiené, Prima
    Karlstad University, Faculty of Arts and Social Sciences (starting 2013), Karlstad Business School (from 2013).
    Interactions, Transitions and Inference Rules in Semantically Integrated Conceptual Modelling2016In: Proceedings of the Sixth International Symposium on Business Modeling and Software Design, Bulgaria: SciTePress, 2016, p. 11-21Conference paper (Refereed)
    Abstract [en]

    To obtain value from the graphical representations that are used by different stakeholders during the system development process, they must be integrated. This is important to achieve a holistic understanding about system specification. Integration can be reached via modelling process. Currently, most of information system modelling methods present different modelling aspects in disparate modelling dimensions and therefore it is difficult to achieve semantic integrity of various diagrams. In this paper, we present semantically integrated conceptual modelling method for information system analysis and design. The foundation of this modelling method is based on interactions. This way of modelling provides possibility of integration of business processes and business data. The inference rules of interactions help in reasoning about the decomposition of concepts. In this method, decomposition of the system is graphically described as classification, inheritance or composition of organizational and technical system components.

  • 48.
    Gustas, Remigijus
    et al.
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Information Systems and Project Management.
    Gustiené, Prima
    Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Information Systems and Project Management.
    Pragmatic-Driven Approach for Service-Oriented Analysis and Design2008In: Information Systems engineering: From Data Analysis to Process Networks / [ed] P.Johannesson & E. Söderström, New York: IGI Global, 2008, p. 97-128Chapter in book (Other academic)
    Abstract [en]

    This chapter presents a pragmatic-driven approach for service-oriented information system analysis and design. Its uniqueness is exploiting a design foundation for graphical description of the semantic and pragmatic aspects of business processes that is based on the service oriented principles. Services are viewed as dynamic subsystems. Their outputs depend not only inputs, but on a service state as well. A precondition state and input flow is sufficient for determining a service output flow and a post-condition state. Intentions of various business process experts are represented in terms of a set of pragmatic dependencies, which are driving the overall system engineering process. It is demonstrated how the pragmatic aspects are linked to the conceptual representations, which define the semantics of business design. In contrast to the traditional system development methodologies, the main difference of the service-oriented approach is that it integrates the static and dynamic aspects into one type of diagram. Computation independent models of semantic fragments are represented by graphical specifications of interactions between service providers and service consumers. Semantic integrity control between the static and dynamic dependencies of business processes is a one of the major benefits of service-oriented analysis and design process. It is driven by the pragmatic descriptions, which are defined in terms of goals, problems and opportunities.

  • 49.
    Gustas, Remigijus
    et al.
    Karlstad University, Faculty of Arts and Social Sciences (starting 2013), Karlstad Business School.
    Gustiené, Prima
    Karlstad University, Faculty of Arts and Social Sciences (starting 2013), Karlstad Business School.
    Principles of Semantically Integrated Conceptual Modelling Method2017In: Business Modeling and Software Design / [ed] Boris Shiskov, Switzerland, Cham: Springer, 2017, p. 1-27Conference paper (Refereed)
    Abstract [en]

    Abstract. To obtain value from the graphical representations that are used by different stakeholders during the system development process, they must be integrated. This is important for achieving a holistic understanding about system specification. Integration can be reached via modelling process. Currently, most of information system modelling methods present different modelling aspects in disparate modelling dimensions and therefore it is difficult to achieve semantic integrity of various diagrams. In this paper, we present the principles of semantically integrated conceptual modelling method for information system analysis and design. The foundation of this modelling method is based on interaction flows. This way of modelling is critical for the identification of discontinuity and inconsistency in information systems specifications. It also provides possibility to integrate business processes and business data, which is necessary for the integration of various architectural domains and to reach the holistic view of enterprise architecture. We have explained in object-oriented terms how interactive, structural and transitional aspects are merged. We also demonstrated the interpretation of various patterns, in terms of semantically integrated conceptual modelling method. It was shown that the method has sufficient expressive power to cover some special cases, which do not match the standard pattern of transaction. The inference rules of interactions help in reasoning about system decomposition. In this method, decomposition is graphically described as classification, inheritance or composition of concepts. SICM method is based on a single type of diagram, which enables reasoning about integration with the help of a special set of inference rules. The ultimate goal of this paper is to present the generic principles for computation- neutral modeling of service interactions.

    Keywords: Conceptual modelling, Modelling aspects, Service interactions, Consistency, Value flows, Inference rules, Decomposition, Object transitions.

  • 50.
    Gustas, Remigijus
    et al.
    Karlstad University, Faculty of Arts and Social Sciences (starting 2013), Karlstad Business School.
    Gustiené, Prima
    Karlstad University, Faculty of Arts and Social Sciences (starting 2013), Karlstad Business School.
    Semantically Integrated Conceptual Modeling Method and Modeling Patterns2014In: Systems and Software Development, Modeling and Analysis: New Perspectives and Methodologies / [ed] Khosrow-Pour, Mehdi, USA: IGI Global, 2014, p. 1-33Chapter in book (Refereed)
    Abstract [en]

    Managing evolutionary changes, identification of discontinuities and separation of concerns is not an easy task in the area conceptual modeling in information system development. One of the fundamental problems is that most conventional conceptual modeling techniques deal with the collections of loosely linked meta-models, which are defined by the different types of diagrams. Typically, system development methods project interactive, behavioral and structural aspects of information systems conceptual representations into disparate views. Therefore, the semantic integrity of various architecture dimensions is difficult to achieve. In this paper we present semantically integrated conceptual modeling method. The advantage of this method is stability and flexibility of the diagrams to manage the constant changes of system requirements. This method provides possibility to visualize the interplay among structural, interactive and behavioral aspects. This is very important for the control of semantic integrity and to maintain a holistic representation, where external and internal views of service conceptualizations are visualized together. Such visualization is also important for separation of concerns which provides foundation for creation of modeling patterns. Modeling patterns are important for several reasons. First, they can be used for demonstration of the interplay of fundamental constructs that are used for system analysis and design. Secondly, modeling patterns are important for the evaluation of the expressive power of semantic modeling languages. It is demonstrated by case study examples that sequential, underlying, enclosing, overriding and overlaying interaction loops between actors provide the foundation for the composition of complex scenarios, which are spanning across organizational and technical system boundaries.

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