1,106 research outputs found

    Embedding Requirements within the Model Driven Architecture

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    The Model Driven Architecture (MDA) brings benefits to software development, among them the potential for connecting software models with the business domain. This paper focuses on the upstream or Computation Independent Model (CIM) phase of the MDA. Our contention is that, whilst there are many models and notations available within the CIM Phase, those that are currently popular and supported by the Object Management Group (OMG), may not be the most useful notations for business analysts nor sufficient to fully support software requirements and specification. Therefore, with specific emphasis on the value of the Business Process Modelling Notation (BPMN) for business analysts, this paper provides an example of a typical CIM approach before describing an approach which incorporates specific requirements techniques. A framework extension to the MDA is then introduced; which embeds requirements and specification within the CIM, thus further enhancing the utility of MDA by providing a more complete method for business analysis

    A Process Modelling Framework Based on Point Interval Temporal Logic with an Application to Modelling Patient Flows

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    This thesis considers an application of a temporal theory to describe and model the patient journey in the hospital accident and emergency (A&E) department. The aim is to introduce a generic but dynamic method applied to any setting, including healthcare. Constructing a consistent process model can be instrumental in streamlining healthcare issues. Current process modelling techniques used in healthcare such as flowcharts, unified modelling language activity diagram (UML AD), and business process modelling notation (BPMN) are intuitive and imprecise. They cannot fully capture the complexities of the types of activities and the full extent of temporal constraints to an extent where one could reason about the flows. Formal approaches such as Petri have also been reviewed to investigate their applicability to the healthcare domain to model processes. Additionally, to schedule patient flows, current modelling standards do not offer any formal mechanism, so healthcare relies on critical path method (CPM) and program evaluation review technique (PERT), that also have limitations, i.e. finish-start barrier. It is imperative to specify the temporal constraints between the start and/or end of a process, e.g., the beginning of a process A precedes the start (or end) of a process B. However, these approaches failed to provide us with a mechanism for handling these temporal situations. If provided, a formal representation can assist in effective knowledge representation and quality enhancement concerning a process. Also, it would help in uncovering complexities of a system and assist in modelling it in a consistent way which is not possible with the existing modelling techniques. The above issues are addressed in this thesis by proposing a framework that would provide a knowledge base to model patient flows for accurate representation based on point interval temporal logic (PITL) that treats point and interval as primitives. These objects would constitute the knowledge base for the formal description of a system. With the aid of the inference mechanism of the temporal theory presented here, exhaustive temporal constraints derived from the proposed axiomatic system’ components serves as a knowledge base. The proposed methodological framework would adopt a model-theoretic approach in which a theory is developed and considered as a model while the corresponding instance is considered as its application. Using this approach would assist in identifying core components of the system and their precise operation representing a real-life domain deemed suitable to the process modelling issues specified in this thesis. Thus, I have evaluated the modelling standards for their most-used terminologies and constructs to identify their key components. It will also assist in the generalisation of the critical terms (of process modelling standards) based on their ontology. A set of generalised terms proposed would serve as an enumeration of the theory and subsume the core modelling elements of the process modelling standards. The catalogue presents a knowledge base for the business and healthcare domains, and its components are formally defined (semantics). Furthermore, a resolution theorem-proof is used to show the structural features of the theory (model) to establish it is sound and complete. After establishing that the theory is sound and complete, the next step is to provide the instantiation of the theory. This is achieved by mapping the core components of the theory to their corresponding instances. Additionally, a formal graphical tool termed as point graph (PG) is used to visualise the cases of the proposed axiomatic system. PG facilitates in modelling, and scheduling patient flows and enables analysing existing models for possible inaccuracies and inconsistencies supported by a reasoning mechanism based on PITL. Following that, a transformation is developed to map the core modelling components of the standards into the extended PG (PG*) based on the semantics presented by the axiomatic system. A real-life case (from the King’s College hospital accident and emergency (A&E) department’s trauma patient pathway) is considered to validate the framework. It is divided into three patient flows to depict the journey of a patient with significant trauma, arriving at A&E, undergoing a procedure and subsequently discharged. Their staff relied upon the UML-AD and BPMN to model the patient flows. An evaluation of their representation is presented to show the shortfalls of the modelling standards to model patient flows. The last step is to model these patient flows using the developed approach, which is supported by enhanced reasoning and scheduling

    Advanced Techniques for Assets Maintenance Management

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    16th IFAC Symposium on Information Control Problems in Manufacturing INCOM 2018 Bergamo, Italy, 11–13 June 2018. Edited by Marco Macchi, László Monostori, Roberto PintoThe aim of this paper is to remark the importance of new and advanced techniques supporting decision making in different business processes for maintenance and assets management, as well as the basic need of adopting a certain management framework with a clear processes map and the corresponding IT supporting systems. Framework processes and systems will be the key fundamental enablers for success and for continuous improvement. The suggested framework will help to define and improve business policies and work procedures for the assets operation and maintenance along their life cycle. The following sections present some achievements on this focus, proposing finally possible future lines for a research agenda within this field of assets management

    Data in Business Process Models. A Preliminary Empirical Study

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    Traditional activity-centric process modeling languages treat data as simple black boxes acting as input or output for activities. Many alternate and emerging process modeling paradigms, such as case handling and artifact-centric process modeling, give data a more central role. This is achieved by introducing lifecycles and states for data objects, which is beneficial when modeling data-or knowledge-intensive processes. We assume that traditional activity-centric process modeling languages lack the capabilities to adequately capture the complexity of such processes. To verify this assumption we conducted an online interview among BPM experts. The results not only allow us to identify various profiles of persons modeling business processes, but also the problems that exist in contemporary modeling languages w.r.t. The modeling of business data. Overall, this preliminary empirical study confirms the necessity of data-awareness in process modeling notations in general

    Ontology-based patterns for the integration of business processes and enterprise application architectures

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    Increasingly, enterprises are using Service-Oriented Architecture (SOA) as an approach to Enterprise Application Integration (EAI). SOA has the potential to bridge the gap between business and technology and to improve the reuse of existing applications and the interoperability with new ones. In addition to service architecture descriptions, architecture abstractions like patterns and styles capture design knowledge and allow the reuse of successfully applied designs, thus improving the quality of software. Knowledge gained from integration projects can be captured to build a repository of semantically enriched, experience-based solutions. Business patterns identify the interaction and structure between users, business processes, and data. Specific integration and composition patterns at a more technical level address enterprise application integration and capture reliable architecture solutions. We use an ontology-based approach to capture architecture and process patterns. Ontology techniques for pattern definition, extension and composition are developed and their applicability in business process-driven application integration is demonstrated

    Architectural Alignment of Access Control Requirements Extracted from Business Processes

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    GeschĂ€ftsprozesse und IT-Systeme sind einer stĂ€ndigen Evolution unterworfen und beeinflussen sich in hohem Maße gegenseitig. Dies fĂŒhrt zu der Herausforderung, Sicherheitsaspekte innerhalb von GeschĂ€ftsprozessen und Enterprise Application Architectures (EAAs) in Einklang zu bringen. Im Besonderen gilt dies fĂŒr Zugriffskontrollanforderungen, welche sowohl in der IT-Sicherheit als auch im Datenschutz einen hohen Stellenwert haben. Die folgenden drei Ziele der GeschĂ€ftsebene verdeutlichen die Bedeutung von Zugriffskontrollanforderungen: 1) 1) Identifikation und Schutz von kritischen und schĂŒtzenswerten Daten und Assets. 2) 2) EinfĂŒhrung einer organisationsweiten IT-Sicherheit zum Schutz vor cyberkriminellen Attacken. 3) 3) Einhaltung der zunehmenden Flut an Gesetzen, welche die IT-Sicherheit und den Datenschutz betreffen. Alle drei Ziele sind in einem hohen Maß mit Zugriffskontrollanforderungen auf Seiten der GeschĂ€ftsebene verbunden. Aufgrund der FĂŒlle und KomplexitĂ€t stellt die vollstĂ€ndige und korrekte Umsetzung dieser Zugriffskontrollanforderungen eine Herausforderung fĂŒr die IT dar. HierfĂŒr muss das Wissen von der GeschĂ€ftsebene hin zur IT ĂŒbertragen werden. Die unterschiedlichen Terminologien innerhalb der FachdomĂ€nen erschweren diesen Prozess. ZusĂ€tzlich beeinflussen die GrĂ¶ĂŸe von Unternehmen, die KomplexitĂ€t von EAAs sowie die Verflechtung zwischen EAAs und GeschĂ€ftsprozessen die FehleranfĂ€lligkeit im Entwurfsprozess von Zugriffsberechtigungen und EAAs. Dieser Zusammenhang fĂŒhrt zu einer Diskrepanz zwischen ihnen und den GeschĂ€ftsprozessen und wird durch den Umstand der immer wiederkehrenden Anpassungen aufgrund von Evolutionen der GeschĂ€ftsprozesse und IT-Systeme verstĂ€rkt. Bisherige Arbeiten, die auf Erweiterungen von Modellierungssprachen setzen, fordern einen hohen Aufwand von Unternehmen, um vorhandene Modelle zu erweitern und die Erweiterungen zu pflegen. Andere Arbeiten setzen auf manuelle Prozesse. Diese erfordern viel Aufwand, skalieren nicht und sind bei komplexen Systemen fehleranfĂ€llig. Ziel meiner Arbeit ist es, zu untersuchen, wie Zugriffskontrollanforderungen zwischen der GeschĂ€ftsebene und der IT mit möglichst geringem Mehraufwand fĂŒr Unternehmen angeglichen werden können. Im Speziellen erforsche ich, wie Zugriffskontrollanforderungen der GeschĂ€ftsebene, extrahiert aus GeschĂ€ftsprozessen, automatisiert in Zugriffsberechtigungen fĂŒr Systeme der rollenbasierten Zugriffskontrolle (RBAC) ĂŒberfĂŒhrt werden können und wie die EAA zur Entwurfszeit auf die Einhaltung der extrahierten Zugriffskontrollanforderungen ĂŒberprĂŒft werden kann. Hierdurch werden Sicherheitsexperten beim Entwerfen von Zugriffsberechtigungen fĂŒr RBAC Systeme unterstĂŒtzt und die KomplexitĂ€t verringert. Weiterhin werden Enterprise-Architekten in die Lage versetzt, die EAA zur Entwurfszeit auf DatenflĂŒsse von Services zu untersuchen, welche gegen die geschĂ€ftsseitige Zugriffskontrollanforderungen verstoßen und diese Fehler zu beheben. Die KernbeitrĂ€ge meiner Arbeit lassen sich wie folgt zusammenfassen: I)\textbf{I)} Ein Ansatz zur automatisierten Extraktion von geschĂ€ftsseitigen Zugriffskontrollanforderungen aus GeschĂ€ftsprozessen mit anschließender Generierung eines initialen Rollenmodells fĂŒr RBAC. II)\textbf{II)} Ein Ansatz zum automatisierten Erstellen von architekturellen Datenfluss-Bedingungen aus Zugriffskontrollanforderungen zur Identifikation von verbotenen DatenflĂŒssen in Services von IT-Systemen der EAA. III)\textbf{III)} Eine Prozessmodell fĂŒr Unternehmen ĂŒber die Einsatzmöglichkeiten der AnsĂ€tze innerhalb verschiedener Evolutionsszenarien. IV)\textbf{IV)} Ein Modell zur VerknĂŒpfung relevanter Elemente aus GeschĂ€ftsprozessen, RBAC und EAAs im Hinblick auf die Zugriffskontrolle. Dieses wird automatisiert durch die AnsĂ€tze erstellt und dient unter anderem zur Dokumentation von Entwurfsentscheidungen, zur Verbesserung des VerstĂ€ndnisses von Modellen aus anderen DomĂ€nen und zur UnterstĂŒtzung des Enterprise-Architekten bei der Auflösung von Fehlern innerhalb der EAA. Die Anwendbarkeit der AnsĂ€tze wurden in zwei Fallstudien untersucht. Die erste Studie ist eine Real-Welt-Studie, entstanden durch eine Kooperation mit einer staatlichen Kunsthalle, welche ihre IT-Systeme ĂŒberarbeitet. Eine weitere Fallstudie wurde auf Basis von Common Component Modeling Example (CoCoME) durchgefĂŒhrt. CoCoME ist eine durch die Wissenschaftsgemeinde entwickelte Fallstudie einer realistischen Großmarkt-Handelskette, welche speziell fĂŒr die Erforschung von Software-Modellierung entwickelt wurde und um Evolutinsszenarien ergĂ€nzt wurde. Aufgrund verschiedener gesetzlicher Regularien an die IT-Sicherheit und den Datenschutz sowie dem Fluss von sensiblen Daten eignen sich beide Fallstudien fĂŒr die Untersuchung von Zugriffskontrollanforderungen. Beide Fallstudien wurden anhand der Goal Question Metric-Methode durchgefĂŒhrt. Es wurden Validierungsziele definiert. Aus diesen wurden systematisch wissenschaftliche Fragen abgleitet, fĂŒr welche anschließend Metriken aufgestellt wurden, um sie zu untersuchen. Die folgenden Aspekte wurden untersucht: ∙\bullet QualitĂ€t der generierten Zugriffsberechtigungen. ∙\bullet QualitĂ€t der Identifikation von fehlerhaften DatenflĂŒssen in Services der EAA. ∙\bullet VollstĂ€ndigkeit und Korrektheit des generierten Modells zur Nachverfolgbarkeit von Zugriffskontrollanforderungen ĂŒber Modelle hinweg. ∙\bullet Eignung der AnsĂ€tze in Evolutionsszenarien von GeschĂ€ftsprozessen und EAAs. Am Ende dieser Arbeit wird ein Ausblick gegeben, wie sich die vorgestellten AnsĂ€tze dieser Arbeit erweitern lassen. Dabei wird unter anderem darauf eingegangen, wie das Modell zur VerknĂŒpfung relevanter Elemente aus GeschĂ€ftsprozessen, RBAC und EAAs im Hinblick auf die Zugriffskontrolle, um Elemente aus weiteren Modellen der IT und der GeschĂ€ftsebene, erweitert werden kann. Weiterhin wird erörtert wie die AnsĂ€tze der Arbeit mit zusĂ€tzlichen Eingabeinformationen angereichert werden können und wie die extrahierten Zugriffskontrollanforderungen in weiteren DomĂ€nenmodellen der IT und der GeschĂ€ftsebene eingesetzt werden können

    Architectural Alignment of Access Control Requirements Extracted from Business Processes

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    Business processes and information systems evolve constantly and affect each other in non-trivial ways. Aligning security requirements between both is a challenging task. This work presents an automated approach to extract access control requirements from business processes with the purpose of transforming them into a) access permissions for role-based access control and b) architectural data flow constraints to identify violations of access control in enterprise application architectures

    Developing System Security through Business Process Modelling

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    Äriprotsesside arusaam ja modelleerimine on ĂŒks olulisematest aspektidesttĂ€napĂ€evases sĂŒsteemiarenduses. InfosĂŒsteemide modeleerimiseks on loodud erinevaid kĂ€sitlusi ning Ă€riprotsesside modeleerimisnotatsioon on ĂŒks nendest. On teada, et BPMN aitab Ă€riprotsesse kirjeldada, modelleerida ja optimeerida. Keerulisem on mĂ”ista kuidas saab selle kĂ€sitluse raames juhtida Ă€riprotsesside turvalisust ning analĂŒĂŒĂŒsida infosĂŒsteemi turvariske. See aspekt muutub kaasaegsetes infosĂŒsteemides veel komplitseeritumaks, kuna turvatud sĂŒsteemi loomiseks peavad nii Ă€riprotsessid kui ka selle turvalisuse kĂŒsimused olema vaadeldud parallellselt, see tĂ€hendab koostoimes. KĂ€esoleva uurimistöö eesmĂ€rgiks on analĂŒĂŒsida BPMN ja infosĂŒsteemi turvariskide juhtimise vastastikkust koosmĂ”ju. BPMN’i vĂ”tmeaspektide vĂ€ljaselgitamiseks ja antud modelleerimissĂŒsteemi turvanĂ€itajate, riskide ja riskide juhtimise mĂ”istmiseks on antud töös kasutatud struktureeritud lĂ€henemist. Töös uuritakse kuidas modelleerija saab BPMN’i abil vĂ€ljastada turvatud sĂŒsteemi komponente, riske vĂ”i riskide juhtimist. Töös ĂŒhtlustatakse BPMN keele pĂ”hikonstruktsioonid ISSRM mudeli kontseptiga. Antud uurimistöös on BPMN-i kĂ€sitluse rakendausvĂ”imalusi vaadeldud ĂŒhe internetikaupluse nĂ€itel. Meie uurimistöö pakkub infosĂŒsteemi analĂŒĂŒtikule vĂ”i arhitektile vĂ”imalust mĂ”ista Ă€riprotsesse ja turvakomponente ĂŒhe modelleerimiskeele abil. AnalĂŒĂŒs on tehtud ainult esimese keele, Descriptive modelling, tasemel. Sellega avatakse uurijale vĂ”imalus tuua paralelle erinevate modeleerimiskeelte vahel, et uurida mustreid ISSRM perekonda kuuluvate mudelite loomises.Business process modelling is one of the major aspects in the modern system development. Recently business process model and notation (BPMN) has become a standard technique to support this activity. Although BPMN is a good approach to understand business processes, there is a limited work to understand how it could deal with business security and security risk management. This is a problem, since both business processes and security concerns should be understood in parallel to support a development of the secure systems. In this paper we analyse BPMN with respect to the domain model of the IS security risk management (ISSRM). We apply a structured approach to understand key aspects of BPMN and how modeller could express secure assets, risks and risk treatment using BPMN. We align the main BPMN constructs with the key concepts of the ISSRM domain model. We show applicability of our approach on a running example related to the Internet store. Our proposal would allow system analysts to understand how to develop security requirements to secure important assets defined through business processes. In addition we open a possibility for the business and security model interoperability and the model transformation between several modelling approaches (if these both are aligned to the ISSRM domain model)

    Construct redundancy in process modelling grammars: Improving the explanatory power of ontological analysis

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    Conceptual modelling supports developers and users of information systems in areas of documentation, analysis or system redesign. The ongoing interest in the modelling of business processes has led to a variety of different grammars, raising the question of the quality of these grammars for modelling. An established way of evaluating the quality of a modelling grammar is by means of an ontological analysis, which can determine the extent to which grammars contain construct deficit, overload, excess or redundancy. While several studies have shown the relevance of most of these criteria, predictions about construct redundancy have yielded inconsistent results in the past, with some studies suggesting that redundancy may even be beneficial for modelling in practice. In this paper we seek to contribute to clarifying the concept of construct redundancy by introducing a revision to the ontological analysis method. Based on the concept of inheritance we propose an approach that distinguishes between specialized and distinct construct redundancy. We demonstrate the potential explanatory power of the revised method by reviewing and clarifying previous results found in the literature
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