A growing interest in e-Government practices is currently expressed within public administrations. This paper describes the evolution of our study in the field of impacts of digitization on the management of administrative procedures. We present a full description of the methodology used, the assumptions and the analysis model on which our study is based. Due to its complexity and its interdepartmental characteristic, the building permit procedure is selected to be the representative administrative process of concern. As Swiss public administrations is the central subject of our research, a description of the relevant legal framework of the country is presented. Specifically, the case study of the Canton of Valais is described in detail. The experience gained from the semi-structured interviews conducted for this case study is exposed