Comprehensive Handling of Temporal Issues in Tasks Models: What is needed and How to Support it?

International audienceThis position paper claims that dealing explicitly with temporal issues in task modelling requires adequate notations and tools. After a brief state of the art in the field of temporal modelling within tasks models we show on a simple case study various kinds of temporal constraints that should or could be integrated in task models. The notation we use is based on a formal description technique called Petri nets. This formalism feature a graphical representation as well as tools supporting the analysis and simulation of models. Even though our experience in the field of task modelling has shown that Petri nets are not easy to use by non computer scientists, we believe that some of the constructs for representing temporal aspects of systems can be fruitfully used for representing temporal aspects of work