The Languedoc-Roussillon, south west Mediterranean, wineries are facing a decline in wine yields particularly Protected Geographical Indication (PGI) wine yields. Climate change is one of the many factors and its effect is also expected to increase in the future. There is also structurally a large heterogeneity of yield profiles among terroirs, varieties and strategies of winegrowers. To investigate the link between yield, competitiveness and resilience multiple approaches have been combined in an observatory of wine yields and competitiveness for Pays d'Oc (PGI) wines. The resilience concept can be approached by the operational tool of trajectories. The present work aims at analyzing individual trajectories of PGI wine growers' to characterize the resilience of these farming systems. By analyzing individual data (toll data) of wine production over 9 years we suggest a methodology to represent their inter annual trajectories.