The chapter evaluates how the TATA-BOX process supported the collective design of an agroecological transition. In order to carry out this evaluation, we interviewed a panel of 24 participants about their experience of the process and their opinions on it. In this chapter we set out the results in relation to three questions: How did the workshops go? What characterised the outputs? What effects were identified? On these bases, we discuss some possible improvements in the TATA-BOX process and the ways in which this process supported the design of an agroecological transition. We show in particular that the TATA-BOX process successfully initiated a collective design process as it allowed the participants to establish a common ground, define a range of goals to meet, and identify actionable means that could help to reach these goals. The process will nevertheless have to be continued through actual implementation. Various actors will most likely take responsibility for limited actions, rather than for the territorial agricultural transition project in its entirety. They will select the design solutions they need and might revise them. The TATA-BOX participatory process thus appears to be one step in the process of designing the territory's transition.