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Gustas, Remigijus, 1956-, et al.
(författare)
A Graphical Method for Conceptual Modelling of Business and Software Scenarios
2012
Ingår i: New Trends in Software Methodolodies, Tools and Techniques. - Amsterdam : IOS Press. - 9781614991243 - 9781614991250 ; , s. 238-253
Konferensbidrag (refereegranskat) abstract
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.
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Gustas, Remigijus, 1956-, et al.
(författare)
Principles of Semantically Integrated Conceptual Modelling Method
2017
Ingår i: Business Modeling and Software Design. - Switzerland, Cham : Springer. - 9783319572215 - 9783319572222 ; , s. 1-27
Konferensbidrag (refereegranskat) abstract
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.
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Gustas, Remigijus, 1956-, et al.
(författare)
Semantically Integrated Conceptual Modeling Method and Modeling Patterns
2014
Ingår i: Systems and Software Development, Modeling and Analysis. - USA : IGI Global. ; , s. 1-33
Bokkapitel (refereegranskat) abstract
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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Gustas, Remigijus, 1956-
(författare)
A Look Behind Conceptual Modeling Constructs in Information System Analysis and Design
2010
Ingår i: International Journal of Information System Modeling and Design. - : IGI Global. - 1947-8186 .- 1947-8194. ; 1:1, s. 79-108
Tidskriftsartikel (refereegranskat) abstract
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.
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