Case elaboration methodology proposed for diagnostic and repair help system based on CBR.

International audienceAlthough the elaboration of the case representation is the key problem of the case-based reasoning system conception there is no proved methodology targeted to this task for now. This paper deals with this lack in the maintenance domain precisely in the equipments diagnostic and repair help. A methodology of the case representation elaboration is proposed based on knowledge management techniques and existing engineering analytical tools used in the industry. Different ontological models are proposed to take into account similarity and adaptability aspects of the case representation and to optimize the case base size

Classification des différentes architectures en maintenance.

L'objectif de ce papier est de lister et caractériser différents systèmes informatiques existants dans le domaine de la maintenance industrielle afin de proposer une classification des différentes architectures de ces systèmes. Deux critères de cette classification s'imposent : l'évolution de l'information utilisée et la relation entre les systèmes intégrés dans les architectures. Quatre architectures génériques sont identifiées, à savoir maintenance, télémaintenance, e-maintenance et s-maintenance. Le type d'architecture de maintenance sémantique : la s-maintenance est proposée prenant appui sur des ontologies communes aux différents systèmes et sur la technologie émergente du Web sémantique. Ce nouveau concept représente une architecture adaptée aux besoins d'intégrer les différents systèmes d'aide aux opérateurs et aux experts de maintenance et ouvre également la possibilité d'utiliser les techniques de gestion des connaissances dans ces systèmes

Reviewing the use of the theory of inventive problem solving (TRIZ) in green supply chain problems

The purpose of the paper is to review the practice of the theory of inventive problem solving (TRIZ) in Green Supply Chain (GSC) problems and to identify new research challenges focusing on the question: “To what extent is it necessary to evolve TRIZ tools, methods and theoretical grounding for addressing GSC inventive problems?” First, a review of the past contributions of TRIZ based methods to GSC problem resolution is presented. As the result of the papers review did not provide a comprehensive understanding of the limitations and areas of potential application of TRIZ in GSC, three experiments were conducted to complete the literature review, in order to provide a more comprehensive answer to the posed question and identify research challenges. The experiments addressing GSC problems were also conducted to explore to what extent the more mature meta-methods of classical TRIZ, namely ARIZ 85 A, C and the related sub-methods, can be used as in GSM problems. The examples were chosen to explore types of GSC problems that were not yet addressed with TRIZ. The experiment results highlight limitations on the use of the TRIZ in GSC inventive problems, which were not mentioned in the GSC literature. Moreover it highlights the limitation of using the more mature meta-methods of TRIZ (ARIZ 85A and ARIZ 85C) when the conflict to overcome contains more than two evaluation parameters and one action parameter. Finally, research challenges to overcome the limitations and to improve the use of TRIZ in GSC inventive problems are stated. Among them, methods for quickly establishing the existence of classical TRIZ contradictions or for informing the problem solver when no TRIZ contradictions are present in a given inventive problem in GSC should be proposed. Such methods would permit determining whether ARIZ 85C could be used and avoid a long and fruitless search for a system of contradictions. Find alternatives to the algorithms proposed in the past to be able to establish the generalized contradictions of inventive problems. Make evolve meta-methods ARIZ 85C or substitute it with methods which can address the inventive problems that cannot be treated by ARIZ 85C

Knowledge reuse integrating the collaboration from experts in industrial maintenance management

Distributed environments, technological evolution, outsourcing market and information technology (IT) are factors that considerably influence current and future industrial maintenance management. Repairing and maintaining the plants and installations requires a better and more sophisticated skill set and continuously updated knowledge. Today, maintenance solutions involve increasing the collaboration of several experts to solve complex problems. These solutions imply changing the requirements and practices for maintenance; thus, conceptual models to support multidisciplinary expert collaboration in decision making are indispensable. The objectives of this work are as follows: (i) knowledge formalization of domain vocabulary to improve the communication and knowledge sharing among a number of experts and technical actors with Conceptual Graphs (CGs) formalism, (ii) multi-expert knowledge management with the Transferable Belief Model (TBM) to support collaborative decision making, and (iii) maintenance problem solving with a variant of the Case-Based Reasoning (CBR) mechanism with a process of solving new problems based on the solutions of similar past problems and integrating the experts’ beliefs. The proposed approach is applied for the maintenance management of the illustrative case study

Interpretation of a General Model for Inventive Problems, the Generalized System of Contradictions

Organised by: Cranfield UniversityDesign of technical systems implies either optimisation or inventive problems resolution. Resolution tools and methods exist for each kind of problems. Each family of resolution tools uses specific models for problem statement. A generic model that fits both kinds of problems has been defined, the Generalized System of Contradictions model. In border of this model a problem can be stated when no solution can be found by optimisation techniques. In this paper the Generalized System of Contradictions is linked to Design of Experiments model. Moreover a step towards problem resolution is proposed by the interpretation of the generic model. This interpretation is based on the definition of exhaustive concepts, it means of concepts enabling to look for solution outside of the initially defined domain. This process of problem statement out of the result of DoE and of interpretation of the built model is detailed and then illustrated through an example.Mori Seiki – The Machine Tool Compan

Contribution à une méthodologie de capitalisation des connaissances basée sur le raisonnement à partir de cas : Application au diagnostic dans une plateforme d'e-maintenance.

Faced with the technological developments, the increasing complexity of the industrial plants and the processes dynamics as well as with organisational changes and staff mobility, maintenance managers want to formalise and capitalize the know and know-how of maintenance operators and experts. To deal with these factors, our objective is to provide a service of maintenance assistance that uses and capitalizes knowledge. Our work has been part of European project Proteus which goal was to develop a generic distributed platform of e-maintenance to integrate and to provide a set of different maintenance systems and applications. We specified four levels of maintenance applications associated each one with a set of decision help systems: equipment analysis, diagnosis and expertise, resource management and maintenance strategy management. These tools require an expertise which we propose to capitalize and preserve in a corporate enterprise memory. In order to create this memory and to develop our diagnostic and repair help system, we introduced a methodology based on the association of knowledge capitalization and knowledge intensive case based reasoning. The development of our system is based on knowledge modeling that consists of a representation model (domain ontology) and a problem solving model (case based reasoning). The suggested models use emerging technologies from the semantic Web which make possible the evolution of e-maintenance concept in a new concept of s-maintenance (semantic maintenance).Face aux évolutions technologiques, à la complexité croissante des équipements industriels et à la dynamique des processus ainsi qu'aux changements organisationnels et à la mobilité du personnel, les responsables de maintenance cherchent à formaliser et pérenniser le savoir et le savoir-faire des employés. Pour répondre à cette problématique, notre objectif est de fournir un service d'aide à la maintenance qui utilise et capitalise les connaissances. Nos travaux se situent dans le cadre du projet Européen Proteus qui a permis de développer une plateforme distribuée d'e-maintenance intégrant les différents systèmes et applications existants en maintenance. Nous avons déterminé quatre niveaux d'applications associés chacun à un ensemble d'outils d'aide : le niveau d'analyse d'équipement, celui de diagnostic et d'expertise, celui de gestion des ressources et celui de gestion des stratégies de maintenance. Ces outils d'aide nécessitent une expertise capitalisée que nous proposons de préserver dans une mémoire d'entreprise. Afin d'élaborer la mémoire ainsi que notre outil d'aide au diagnostic et à la réparation, nous avons introduit une démarche de capitalisation des connaissances articulée autour d'une méthodologie de raisonnement à partir de cas (RàPC) guidé par les connaissances. La conception de l'outil passe par la modélisation des connaissances qui se décline en un modèle de représentation (une ontologie du domaine) et en un modèle de résolution de problèmes (RàPC). Les modèles proposés utilisent des technologies émergeantes du Web sémantique permettant de faire évoluer le concept d'emaintenance vers un nouveau concept de s-maintenance (maintenance sémantique)

Craft villages and tourism development, a case study in Phu Quoc island of Vietnam

Craft tourism is attracting many domestic and foreign tourists. In recent years in Vietnam, craft villages have exploited their potentials in tourism industry. For many different causes, tourism activities have yet reached expectations and their potentials for tourism development. This paper is to review their currents, tourism potentials and limitations and then formulate recommendations to the tourism development in Phu Quoc island. The data for this paper are from two sources. Secondary data were collected from the vast literature and journals. Primary data were from interviews with village owners, related authorities, tourists, tourism corporate, etc. and results serve as guidelines to develop the tourism industry and management