http://popups.lib.uliege.be/1373-5411/index.php?id=1782 Index terms fr 0 http://popups.lib.uliege.be/1373-5411/index.php?id=1582 In the paper, the simulation approach to decision support in enterprise has been described. The role of the subject in the modelling of a complex system is discussed. It shows that the main problem in the modelling of complex systems derives from the complexity of the systems themselves and not from the short comings of the particular methodology. The article continues with the general simulation model of the business system described by Forrester's system dynamics. The methodology is sufficiently abstact to allow a qualitative and quantitative analysis of system functioning through feedback loops. The multiple criteria function used for the evaluation of different scenarios was defined with the aid of a decision group using the group support system. The methodology was successfully tested on real cases. Mon, 15 Jul 2024 15:15:01 +0200 Mon, 07 Oct 2024 12:42:56 +0200 http://popups.lib.uliege.be/1373-5411/index.php?id=1582 http://popups.lib.uliege.be/1373-5411/index.php?id=1777 The conversation is the most common interaction process in the daily life : the goal of this paper is the extraction of information on the evolution of a communicative process through simple quantitative measurements. The whole interview process has been considered as a complex system evolving in the time. Our approach founds on analogies between conversation processes and chaotic systems. The proposed procedure allowed the extraction of information on the conversation evolution : phase portraits with anomalous paths indicate situations where the communication has been troubled from external references. Some parameters showing very good indication on the process evolution are proposed. Tue, 16 Jul 2024 15:34:52 +0200 Tue, 16 Jul 2024 15:35:04 +0200 http://popups.lib.uliege.be/1373-5411/index.php?id=1777