Our society is facing a number of great challenges which will require all of us to significantly change our lifestyle in the coming years. To support people in those transitions, next to systemic changes, new designs are required that intentionally redirect behaviour for the common good. Intentionally changing behaviour comes with a great responsibility, as designs that do not live up to their promises can – for instance – nurture false beliefs that people are doing good. Changing behaviour is something that takes a long time to materialise, and the effect is often not sustained in the long-term. This research investigated how to improve the critical assessment in order to anticipate the effects of a design.