Léonard Michel

Léonard Michel
University of Geneva | UNIGE · Institute of Service Science (ISS)

Computer Science - Information systems - Service Science

About

123
Publications
17,527
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748
Citations
Additional affiliations
September 1977 - present
University of Geneva
Position
  • Professor (Full)

Publications

Publications (123)
Article
Full-text available
This paper introduces the Responsible Service logic to clarify the responsibilities of managers in the establishment of services inside society. Nowadays, managers have to foster the discovery of new Exploration and Innovation activities (E&I). Indeed, they have to address business and societal challenges with much more consistency and responsibili...
Conference Paper
Full-text available
This paper introduces the F2Concept database system that is an extension of the F2 object-oriented system. The main feature of F2Concept is its ability to represent intensional information about database classes. Intensional information, usually found in terminological databases, is useful for database modelling, operation, and evolution. A descrip...
Book
In our time, digital technologies, through the observations of invisible phenomena which would be impossible without them, have already induced a multitude of disruptive practices. As this effect and its inevitable implications continue to accelerate into the future, their integration into the progression of Society and enterprise is now absolutely...
Chapter
This paper presents an exploratory approach for the governance of Society in the context of Smarter Life. By answering the challenges of the era of Digitalisation, facing profound societal changes, benefiting from multiple innovations, information systems and services play an outstanding role in improving and enhancing life of humans and contribute...
Conference Paper
Full-text available
Il s'agit ici d'un résumé étendu de notre article (Ralyté, Léonard, 2019). Pour réussir, la transformation numérique ne peut pas être considérée comme relevant d'un seul département ou d'une seule organisation. Sa mission consiste à fournir de nouveaux services d'information interdisciplinaires voire transdisciplinaires. L'intelligence collective e...
Conference Paper
Full-text available
To be successful, Digital Transformation cannot be considered as a matter of a single department or a single organization, regardless of whether the organization is private or public. Its mission consists in providing new inter-disciplinary or even trans-disciplinary information services. Therefore, collective intelligence is a key for its success....
Book
Aujourd’hui, dans tous les secteurs de la Société, les technologies numériques, présentes et futures, induisent l’émergence d’une multitude de connaissances disruptives de phénomènes invisibles sans elles, ainsi que d’une multitude de pratiques disruptives impossibles sans elles. Il s’agit de les intégrer dans une progression de la Société ou d’une...
Chapter
Full-text available
The progress of Society depends largely on the success of its digital transformation, i.e. on the development of digital infrastructure taking form of information services. Moreover, the challenge consists in building interdisciplinary or even transdisciplinary information services and service systems. Given the variability of activities to conside...
Article
Full-text available
This paper introduces a unified representation for collaborative development of complex services in public safety to explain the infusion of digital technologies into the design of the community resilience processes with respect to potential hazardous events. It aims helping to understand how ICT-based knowledge may help stakeholders situated in va...
Conference Paper
Full-text available
Sustainability of enterprise Information Systems (ISs) largely depends on the quality of their evolution process and the ability of the IS evolution steering officers to deal with complex IS evolution situations. Inspired by Olivé [1] who promotes conceptual schema-centric IS development, we argue that conceptual models should also be the centre of...
Chapter
Full-text available
Evolution is characteristic to all enterprise information systems (IS) because of continuing changes in its environment. It is also a necessary condition for guaranteeing IS fitness to the organizational needs and requirements. Nonetheless, each IS evolution presents several risks towards their sustainability and requires an accountable steering. I...
Conference Paper
Full-text available
Information System (IS) evolution is today a continuous preoccupation of every modern organization that aims to have a perfect support for its constantly changing business ecosystem. However, the task of IS evolution is not anodyne, it presents several risks towards IS sustainability as well as towards enterprise activity. Taking a decision related...
Research
Full-text available
Smartness in DBMS is to introduce pertinent evolution services inside a DBMS. A first layer is to have a complete set of schema evolution methods, for instance to create, delete attributes and classes. A second layer is to use a larger concept, for instance the hyperclass concept, and to develop schema evolution methods at this level. So it's possi...
Conference Paper
Services, coming from multiple independent innovations, contribute significantly to the dynamics of contemporary societies. Most often, they owe their emergence to intense, interdisciplinary, inter-institutional, and often international collaboration. In particular, such collaboration must concretely at the service level, consider the relationships...
Article
Full-text available
Service-oriented paradigm is emerging as a promising solution to handle enterprise information systems (IS) complexity, interoperability, and evolution issues. However, the shift from a conventional IS architecture to a service-oriented one is not an easy task. Various approaches have been proposed in the literature and most of them deal with eithe...
Chapter
The human world is undergoing a startling transformation; rapidly evolving as the discovery of new cognitive environments give rise to innovative models essential for creative coexistence to flourish in every facet of society; in all public, private and international sectors; and in regional, national and international contexts. These cognitive env...
Conference Paper
Full-text available
Evolution is characteristic to every Information System (IS) because of continuing changes in its environment. It is also a necessary condition for guaranteeing IS fitness to the organizational needs and requirements. Nonetheless, each IS evolution presents several risks towards its sustainability and further changes, and steering IS evolution is i...
Article
In this paper we discuss the impact of services on the development of the knowledge society and show how their design principles lead to sustainable development. We start by analysing the existent research of this domain that helps us to identify the essential characteristics of the knowledge society. Then we present our research hypothesis for ana...
Conference Paper
Full-text available
Service-orientation is currently considered as a promising paradigm to deal with the complexity, interoperability and evolution of enterprise Information Systems (IS), which are the foremost preoccupation in today’s enterprises. However, the shift from a conventional IS architecture to a service-oriented one is not an easy task despite of the vario...
Conference Paper
Full-text available
The importance and benefit of group work is nowadays widely recognized and acknowledged in education. Group work can be supported by online shared workspaces that allow group collaboration. However, the e-assessment of group work remains an issue. Most of the existing strategies rely on intra-group peer assessment to evaluate individual contributio...
Chapter
Full-text available
This chapter is an overview of the development of the information sys-tems domain since its infancy. This domain is recognized as very important for the development of private companies and public organisations and therefore it more and more needs solid concepts and sharp ways of thinking. This chapter relates some breakthroughs and tries to place...
Conference Paper
Full-text available
The stake of the service engineering for e-Government is not to implement an application, a Web service or a combination of Web services: it is to build an information system for e-Government, which is much more complex. Service orientation is currently considered as a promising paradigm to deal with the complexity of information systems. The respo...
Article
The uncertain, unpredictable and ever-changing conditions of the information system (IS) enterprise environment require adaptive and holistic approaches from the IS engineering methods. As an answer, the agile paradigm has emerged in the business as well as in the software and IS development. In this context, we consider the idea that initiatives c...
Conference Paper
The main challenge for an enterprise Information System (IS) is to be able to evolve in a sustainable way, that is, to be capable to adapt itself to the new environment, to dynamically integrate the ever-changing conditions of this environment, and to be sustainably coherent with the evolving challenges. Another important challenge for an IS is to...
Conference Paper
Full-text available
This paper discusses the role of initiatives in dynamic collaborative processes of services innovation and evolution in the organizational context of an enterprise. The research is based on the current state of the art on modeling initiatives and services and studies phenomena of innovation and evolution for supporting services. Within our approach...
Conference Paper
Full-text available
Continuous changes and extensions of enterprise information systems (IS) are the main causes of their fragmentation and redundancy. The notion of service and service-oriented engineering emerges as a prospective approach to deal with IS evolution. The shift form IS to information services systems (ISS) requires to re-think the fundamentals of IS de...
Conference Paper
The paper reports on the final results of the European DELLIISS project (www.delliiss.eu) which objective was to establish an Executive Master degree in Innovative Service Systems (EMISS) targeting professional people. The paper explains the systematic process that has been followed for building the content of the EMISS curriculum, including: (1) t...
Conference Paper
Full-text available
This paper presents an approach for the specification of business services upon multiple existing information systems (IS). Indeed, the challenges that a service architect has to face with the IS complexity from one side (due to the intertwinement of the organisational, informational, technological and ontological spaces), the complexity of its evo...
Article
The importance of innovation in development of new services can hardly be overestimated. While studying new challenges our services-based society brings today, we start the research from identifying the main concepts and processes related to service innovation and from presenting the state of the art corresponding to these interdependent phenomena....
Conference Paper
Full-text available
This paper studies the problem of collaborative decision constructing in the context of services society. Starting by identifying the characteristics of services society and new challenges it should face, we present the problem of collaborative decision making and discuss creativity aspects of multi-domain collaboration. We analyze the main risks r...
Conference Paper
Full-text available
We propose an evolutive collaborative training platform for large size classes (with hundreds students) in blended learning where students collectively contribute to the co-construction and co-tutoring of the required knowledge to co-produce their semester project. This collaborative platform is implemented as a social network. In this version of t...
Conference Paper
Full-text available
Despite the dominance of the service sector in the last decades, there is still a need for a strong foundation on service design and innovation. Little attention has been paid on service modelling, particularly in the collaboration context. Collaboration is considered as one of the solutions for surviving or sustaining the business in the high comp...
Conference Paper
This paper describes our approach for supporting the idea development process by integrating the ontological vision and services-oriented approaches. We start by analyzing the existing models for the creative process and by identifying new challenges of the creative society, while focusing on different kinds of knowledge charactering the creativity...
Conference Paper
Full-text available
Integration of different components that compose enterprise Information System (IS) represents a big challenge in the IS development. However, it is indispensable in order to avoid fragmentation of the IS and redundancy between different IS applications. In this work we consider service-driven IS engineering as a prospective approach to deal with I...
Conference Paper
Full-text available
Changes and extensions of enterprise information systems (IS) often engender their fragmentation and redundancy. In order to overcome these problems, service-driven IS development is considered as a potential solution to support IS evolution when guaranteeing its integrity and consistency. In this work we consider the integration of new information...
Article
Full-text available
We propose a collaborative training platform where students collectively contribute to the co-construction of the required knowledge to produce their individual semester project. Peers feedback is implemented in order to complete trainers’ supervision with peer-training. This collaborative platform is implemented as a social network, where collabor...
Article
This paper describes our approach for modelling cognitive information systems by putting together formal semantic models, service-oriented approaches, and formalised actionable knowledge. First, we analyse the interdependence of the ontological vision and the service-oriented approaches for modelling the information systems. Second, we formulate th...
Conference Paper
Full-text available
Nowadays, services have become the major growth-driver of many economies. In fact, about 75% of GDP of developed countries comes from the service sector so that the global economy is dominated by this sector. A thorough understanding as well as innovative approaches, such as new methods, models and frameworks for a network of services systems is ne...
Conference Paper
Full-text available
The compliance of e-government services with legal aspects is a crucial issue for administrations. This issue becomes more difficult with the fast-evolving dynamics of laws. This chapter presents our approach to describe and establish the link between e-government services and legal sources. This link is established by an ontology called ``law-base...
Conference Paper
Full-text available
Increasing tendency towards globalisation and outsourcing of software and information systems (IS) development poses a number of challenges and difficulties that companies have to deal with. Quite a few studies have been conducted which have identified a set of problems as well as potential benefits of distributed systems development. In this paper...
Conference Paper
Full-text available
Information Systems (IS) of electricity distribution companies are often composed of various and heterogeneous applications or systems that need to exchange information. Distribution activities evolve in different contexts and environments, and the interoperability is a particular difficult task to realize for electricity distribution companies. A...
Article
Full-text available
www.fsggroup.com Increasing trend towards globalisation and outsourcing of software and information systems (IS) development engenders a number of challenges and difficulties that companies have to deal with. A number of studies have been conducted in order to identify problems as well as potential benefits of distributed systems development. In th...
Chapter
Full-text available
Nous présentons dans cet article une méthode de construction des ontologies à base des lois ainsi que son application dans le développement des Systèmes d'Information (SI) institutionnels. Cette méthode vise à clarifier et à établir le lien entre les lois, régissant les activités métier au sein d'une institution, et le SI qui permet de supporter ce...
Conference Paper
Nowadays, the information systems (IS) development process becomes more and more complex. It may include several IS development and maintenance projects, which are at different stages of the life cycle. Those projects may be carried out in parallel or in sequence, and may employ different software processes, methods, and tools. From our standpoint,...
Conference Paper
Full-text available
Integration of new components into existing information systems (IS) is a challenging problem mainly because of the data sharing. In this paper we propose a situation-driven approach for IS components (IS-COTS) integration into existing IS. We claim that such an approach has to take into account a large number of situations and therefore has to be...
Chapter
The literate data modelling paradigm provides a basis for structuring, justifying, and documenting the data modelling process. The paradigm is based on deliberation schemas consisting of issues, positions, and arguments. Deliberation schemas provide both a default argumentation space for decision-taking and a structure for recording the rationale o...
Conference Paper
Full-text available
Information Systems (IS) have a major impact on human activities. They are not only "objects or products" because they directly concern our access to knowledge, our possibility to assume activities and even our survival in this economic world. Due to these IS stakes, we propose to position the regulation process at the level of initiatives in the I...
Conference Paper
This paper deals with a framework for e-government information systems engineering (eGovIS). This framework composed of four eGovIS levels: the ontology level, the informational level, the activity modeling level and the technical level. We use laws as main source of knowledge in order to analyze and to construct the eGovIS. The invariants concepts...
Book
Interoperability: the ability of a system or a product to work with other systems or products without special effort from the user is a key issue in manufacturing and industrial enterprise generally. It is fundamental to the ...
Conference Paper
Full-text available
Our research addresses the issue of capturing and managing knowledge used in information system (IS) development. In the proposed approach, we argue that conceptual specifications of information systems are the fundamental constituents of knowledge used in IS development. We have tried to realize our research by both experimenting or by reasoning....
Article
Full-text available
La réussite des projets d’e-Gouvernement est fortement liée à la qualité des Systèmes d’Information (SI) mis en place par l’institution. Nous présentons dans ce papier, une nouvelle stratégie et de nouveaux concepts pour développer les SI pour l’e-Gouvernement. Cette stratégie est construite selon un cadre de référence comprenant quatre niveaux: le...
Chapter
An Enterprise Information System must be pertinent for the human and enterprise activities. It plays a central role because most of the activities are now supported by an information system (IS) and also because the Enterprise development process, itself, is depending on the IS development in most cases. Enterprise and IS developments are completel...
Conference Paper
Full-text available
This article proposes a new generation of information systems (IS) that takes into account the current challenges of information system engineering today such as information system coordination as well as components for enterprise-wide information systems. This new generation is supported by the component-based development approach, which is based...
Conference Paper
This paper presents a concept called Component based Information Systems Re-Engineering (CISRE), which lays down the foundation of a new re-engineering approach. CISRE covers all the facets of Information Systems (IS) at three levels: system, collaboration and organization. This approach contains two main phases respectively: the comprehension phas...
Article
This work presents the different existing information system architectures. These architectures are regrouped under four categories: dispersed information system, agent based information system, distributed information system, and federated information system. It's based on seven criteria: the heterogeneity, autonomy, integration, evolution, integr...
Conference Paper
Summary form only given. We describe aa collaborative Web based architecture in terms of a collection of generic architectural patterns that define how the different components of the framework interact. Based on a J2EE specification and on EJB components, we detail the implementation of this framework in a distributed Web services environment. The...
Conference Paper
Full-text available
In this paper, we present our vision on the component bas ed Information Systems (IS) d e- velopment and propose a definition of an IS component (ISC). For us, an ISC is a particular IS, integrating static, dynamic and integrity rules specifications. The concept of hyperclasses (HCl) is used to implement the static space of an ISC. A HCl is built o...
Article
This paper introduces an overview of a component-based development (CBD) approach based on the concept of Information System component that aims to be conformed to the nature of information system (IS) and hhandles components at the earlier phases of the development process.
Conference Paper
Full-text available
In this paper, we define an Information System component (ISC) in a data-intensive application context. An ISC is considered as an autonomous IS, respecting a set of completeness conditions. It is defined through a static space, a dynamic space and an integrity rules space. We use the hyperclass concept to implement the static space. A hyperclass i...
Article
Full-text available
A hyperclass is a large class, formed from a subset of conceptual classes of the global schema of a database, forming a unit with a precise semantics. It describes a particular field of competence on the global schema. A hyperclass is defined by its set of member classes, its root class and its associated acyclic and oriented navigation graph. The...
Article
Full-text available
Nowadays, wholly integrating of enterprise information assets is an area both of intensive theoretical speculation and practical research and development. In order to gain that objective, our article attempts to propose a strategy for both theoretical and practical levels to focus on the conceptual specifications of business applications. We develo...
Article
Full-text available
Smartness in DBMS is to introduce pertinent evolution services inside a DBMS. A first layer is to have a complete set of schema evolution methods, for instance to create, delete attributes and classes. A second layer is to use a larger concept, for instance the hyperclass concept, and to develop schema evolution methods at this level. So it's possi...
Conference Paper
Modifying the schema of a populated database is an expensive operation. We propose to use the non-classical transposed storage of an object database. The transposed storage avoids database reorganization and reduces the number of input/output operations in the context of schema evolution. Thus schema changes are not anymore costly operations. Conse...
Conference Paper
Specialization is an abstract concept which expresses the IS-A relationship while inheritance is a mechanism which implements specialization. Our experiences in extended entity-relationship DBMSs and object-oriented DBMSs have shown that specialization can be implemented by several mechanisms. We propose in this paper a mechanism which is more flex...