Resumo | This project aims to set the basis for a deep and consistent sociological research about the work of health professionals in the different types of palliative care (PC) teams existent in Portugal, in order to develop a groundwork model suitable to increase the quality of the intervention of PC teams, namely in what we might call its social dimension. Thus, the objectives of the project are: i) to analyze collaboratively the processes of defining and communalizing medically-defined end-of-life (EoL) trajectories put into place by PC professionals in order to reduce uncertainty and appease disquietude and discord among relevant actors (the patients and their families) in EoL situations in the frame of PC; ii) to identify and systematize collaboratively the main interactional difficulties and challenges which occur in these processes of definition and communalization; iii) to understand if and in what grounds there is significant variation in this kind of processes in different PC contexts, i.e., in different types of PC team; iv) to organize, departing from the knowledge produced in the frame of the objectives i), ii) and iii), a knowledge transfer groundwork model suited to enhance the quality of the interventions of PC teams, namely in what concerns the processes in analysis.