Pre-analysis is a traditionally structured process in which the role of the client is limited. With (assisted) self-measurement, this process is designed together with the client at Hestia. The advantage is active involvement and greater awareness. With traditional inclusion criteria and processes, the percentage of self-measurers fluctuates around 15%. Through a different way of process design, which is supported by IT and a conversion plan, the number of (assisted) self-meters is increased.