Faced with climate change and the increase in food-related diseases, policy makers are looking for new levers to encourage more sustainable consumption behaviour and food systems. The reterritorialisation of food, mainly addressed through the development of short food chains and local food policies, is presented as a potential solution. However, 8territorialised food systems9 (TFS) are still vague systems, in constant evolution, and on which quantitative data are still rare. The objective of the PLAT4TERFOOD project carried out in France (2023-2028) is to develop robust methods and adapted devices to produce new data allowing to better characterize these systems and to evaluate their impacts in the long term. The objective of this communication is to present the results of the DELPHI method used at the beginning of the project to both co-circumscribe TFS and co-define indicators for routine quantitative analysis of their contribution to sustainability. Experts from 4 activity sectors were asked to comment on an operational definition of TFS, to select impact indicators and to prioritise the key sustainability issues to be measured for TFS. Results are intended to facilitate the monitoring and steering of TFS, in particular in conjunction with local food policies that are developing in Western countries.