in October 2012, defry ardianta and endy prasetyo has the opportunity to tutor the collaborative studio between ITS, ITB and FH Erfurt Germany with Hari Purnomo, M.Bdg.Sc., Dr.Ing. Widjaja Martokusumo and Prof. Rolf Gruber. This workshop was put on the case of  Stasiun Semut Surabaya revitalization as the topic and the output of the design presented to Surabaya city government as an alternative proposal in the development of Stasiun Semut.