A cooperative design is a social activity inside a group. In this kind of activity, each actor plays a specific role. If each actor wants to realize the actions corresponding to his role, he needs some adaptive information about the cooperation context.The cooperation context of design project is a relational organization where each actor maintains specific relations with other people (designers, project managers, etc.) but also with documents and activities. Such a cooperation context exists in architectural cooperative design which is distinguished by a "mutual prescription" between actors. In architectural design we are in a network model of actors, instead of the hierarchical model that we can find in classical workflow tools.This organization has to be represented in the project management tool to give each user an adaptive vision of the project organization and evolution.The representation and the visualization of such a network, which characterizes each project, is the main objective of the "Relational Model of Cooperation" and the hypermedia view presented in this paper.

The digital transition is changing the way architectural firms are making design. The BIM technology, which tends to become mandatory for legal and competitive reasons is both convincing because of its parametric and global modeling sides and frightening because of changes caused by the arrival of new digital tools. Indeed, our basic postulate is that the emergence of new digital tools must necessarily be followed by the emergence of new practices and new project management in design stage. This research focuses on innovative project management methods and collaborative practices allowing to facilitate the integration of new digital tools in order to create innovative practices and methods adapted to computer-assisted and collaborative architectural design. We take inspiration from agile methods and practices born in the software engineering world in the 1990s. Agile methods are innovative project management methods that focus mainly on a better reactivity. We have thus identified that a better reactivity is corroborated to a better collaboration around the understanding and repartition of design tasks. Thus, we focus in particular in this paper on elicitation of architectural intentions and refinement of design tasks in collaborative groups of students working on a BIM project. For this purpose, we have set up a collaborative matrix that students fill up by explaining together their architectural wills and intentions for this project exercise. Naturally follows a defining "tasks to be done" process, which we will detail in this paper. Keywords: BIM Á Agile methods Á Agile practices Á Collaboration Á Architectural design Á Project management Á Collaborative and digital uses Á Collaborative and digital practices

This paper describes a scientific experiment carried out in the context of the AEC in France. This research is part of the digital transition in architecture, with a particular interest in BIM technology and how to integrate it into architectural design through social sciences. Indeed, the arrival of BIM technology raises both technical and human questions. The design work is changed, the amount of work is moved upstream, but above all we see new tools, new uses, and new practices without any project management method emerging. In other fields such as industry, software engineering and HMI design, we have seen the emergence of methods that focus more on the team and the user than on the process. We find Lean, continuous improvement, or agility, a family of methods that interests us here. Our research hypothesis is that inserting agile practices alongside current business practices will integrate and exploit BIM technology and other digital innovations. To do this, we identified what the problems were with BIM technology, and selected several agile practices highlighting communication, group cohesion and customer needs identification to address them. Thus, we carry out experiments in which we test, analyze and adapt these agile practices to architectural design. This paper then describes a pedagogical experiment conducted with Master 2 students at the École Nationale Supérieure d'Architecture of Nancy in France. In a workshop, the students had to carry out a BIM project, while they used the agile practices that we had adapted: the design matrix, the micro poker, and the standup meeting. In addition to these three practices, we took the opportunity to try agile overseeing using what we call a stand-up meeting. The objective is to validate the synergy of these practices while ensuring that they respond to our communication, group cohesion and customer needs integration issues. This experiment takes place over one week and will serve as a basis for us to prepare experiments in a professional context.

In the Architecture Engineering and Construction sector (AEC) cooperation between actors is essential for project success. The configuration of actors' organization takes different forms like the associated coordination mechanisms. Our approach consists in analyzing these coordination mechanisms through the identification of the "base practices" realized by the actors of a construction project to cooperate. We also try with practitioners to highlight the "best practices" of cooperation. Then we suggest here two prototypes of IT services aiming to demonstrate the value added of IT to support cooperation. These prototype tools allow us to sensitize the actors through terrain experiments and then to bring inch by inch the Luxembourgish AEC sector towards electronic cooperation.

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