Workflow technology for complex socio-technical systems

Thèse numérisée par la Direction des bibliothèques de l'Université de Montréal

Addressing Dynamism in E-negotiations by Workflow Management Systems

Workflows (Wfs) are a major enabling technology for e-commerce. In our research, a Combined Negotiation (CN) is modeled and enacted using Wf technology. The modeling task captures the sequencing of the individual negotiations as well as the dependencies between them, and the enacting task runs the model. A CN support system (CONSENSUS) is used by the user to perform both tasks. Supporting dynamic modifications to the model during run-time should increase the benefits of our approach. In this paper, we highlight the need for such support by identifying the dynamic aspects that can occur while negotiating the different items of a package (i.e., the CN object). To address these aspects, we experimented using ADEPT, a Wf Management System supporting dynamism. This leads us to discuss the Wf Reference Model of the Wf Management Coalition, and suggest a "dynamic" extension to the current functional areas and architecture. La technologie des Workflows (Wfs) s'est avérée importante pour le commerce électronique. Dans le cadre de notre recherche, une négociation combinée (CN) est modélisée et exécutée utilisant un Wf. La phase de modélisation capture la séquence des différentes négociations ainsi que les dépendances qui existent entre elles. La phase d'exécution quant à elle, permet comme son nom l'indique, d'exécuter le modèle. Un système de support pour les CN (CONSENSUS) est utilisé pour accomplir ces deux tâches. Supporter les modifications dynamiques du modèle lors de l'exécution devrait augmenter les bénéfices de notre approche. Dans cet article, nous mettons l'emphase sur le besoin d'un tel support, ceci en identifiant les aspects dynamiques qui peuvent apparaître lors de la négociation des différents items d'un package (i.e., l'objet de la CN). Nous utilisons ADEPT - un système de gestion de Wf qui supporte le dynamisme - pour étudier ces aspects. Ceci nous mène à discuter le modèle de référence de la Wf Management Coalition, et à proposer une extension "dynamique" à l'architecture actuelle.e-Negotiations, Sourcing, Workflows, Workflow management systems, Dynamism, Négociations électroniques, Approvisionnement, Workflows, Systèmes de gestion de Workflow, Dynamisme

Évaluation qualitative et quantitative d'outils de visualisation logicielle

Mémoire numérisé par la Direction des bibliothèques de l'Université de Montréal

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Our goal with respect to a student learning process is threefold: we want him to learn from his mistakes, we want him to learn from others' mistakes, and we do not want him to repeat his own mistakes

A Framework for Semantic Recovery Strategies in Case of Process Activity Failures

Abstract: During automated process execution semantic activity failures may frequently occur, e.g., when a vehicle transporting a container has a breakdown. So far there are no applicable solutions to overcome such exceptional situations. Often the only possibility is to cancel and roll back respective process instances what is not always possible and more often not desired. In this paper we contribute towards the system–assisted support of finding forward recovery solutions. Our framework is based on the facility to (automatically) perform dynamic changes of single process instances in order to deal with the exceptional situation. We identify and formalize factors which influence the kind of applicable recovery solutions. Then we show how to derive possible recovery solutions and how to evaluate their quality with respect to different constraints. All statements are illustrated by well–studied cases from different domains.