In order to streamline and optimise the outpatient journey, the NANCY CHRU adopts an innovative solution allowing the geolocation of patients in their outpatient journey and the geoguiding in real time and in autonomy of patients to facilitate their orientation with the use of smartphones inside and outside the various sites. The solution chosen is a mobile application on smartphone, which aims to improve the care of patients in outpatients by combining geolocation and geoguiding. On the patient side, it guides the user from where he is, to the building where he needs to go, and then to the CHRU buildings to the place of appointment. An outpatient will be able to consult his appointments, treatment times and see any delays related to congestion. It is informed in real time of changes in location or schedule and its itinerary is automatically recalculated. On the CHRU side of Nancy, the application is used by staff to track patient journeys, anticipate flows and adjust schedules in real time. The outpatient service dynamically pilots patient flows thanks to the application that facilitates the patient journey but also the care journey. The CHRU of Nancy wishes to facilitate the daily life of its teams to allow everyone to exercise in the best conditions and his patient in order to offer access to the widest possible care, simple