In many countries in Europe there will be built only few total new hospitals, but a lot of existing hospitals need to be adapted to the requirements of the future. For this process of planning we need masterplans. However, there does not exist an exact definition of the term "Masterplan" up to now. Therefore several committees tried to rectify this lack. The UIA WP Public Health focussed the exchange of experience in the field of updating and upgrading existing hospitals in its last International Public Health Seminars. It has shown that the process of masterplanning step by step is similar in many countries. UIA WP Public Health now tries to find new ways for a better understanding: to develop a definition of terms, to standardize the building structure of hospitals as well as the structure of the process of masterplanning and its depiction. We now have received the first interesting results and we are looking with optimize into the future.