The new types of work organization could have negative impacts on individuals (fatigue, chronic stress, musculoskeletal disorders…) just as on establishments (absenteeism, personnel turnover…), which want to better understand the phenomenon in order to establish appropriate management measures. The scientific literature designates the workload as a common denominator in this case, except that evidence on the conceptualization of this phenomenon is limited and does not take into account its complexity. To define and characterize it according to a systematic approach, the researchers will attempt to determine its scope as well as the underlying dynamics and organizational processes. The results of this exploratory and descriptive study will be disseminated in the form of a summary fact sheet explaining the overall phenomenon of workload.