Abstract. We report on the initial findings of an exploratory action research study about effects specifications using the systems development method Effects-driven IT development. It is part of a larger IS pilot implementation project conducted in the Danish healthcare sector. Through interviews and a workshop we have identified and specified effects that comprise the basis for an evaluation of the project between several organisational agents with diverse professional backgrounds. Gathering organisational participants at a workshop with a common goal of discussing and prioritizing a finished list of effects has proved to be a valuable approach to create mutual learning process amongst the participants and the facilitators of the workshop. The challenges we experienced during the effects specification process were to balance a dichotomous focus between on one hand the visions of the participants and on the other hand the limitations of the IT artefact functionality to be evaluated.