Terms of environment temporal management in a conduct of multiple processes, in dynamic situations : A research in horticulture production. This research focuses on how to manage temporalities in professional situations strained between the needs of a multiple dynamics production and a rationalization of work supposed to meet the economic needs of the company. The thesis is that workers, especially in this case middle managers in horticulture production, manage their temporal work environment in the dynamics of their activity. This management is active in the sense that it integrates timeframes, which are both resources and constraints in their activity. Temporal environment management can be hampered by some configurations of timeframes, which do not enable these workers to masterise production risks, and risks for themselves or other workers.We propose a formalization of timeframes and their relationships in the dynamics of the temporal environment. The methodology consists in a process of “unfolding” temporalities. It is based on ergonomic activity analysis. Modeling timeframes and temporal environment management is a functional conceptualization to analyze the temporal conditions of work as resources for pragmatic temporal acting, in work activity.
