In a purpose of a safe system design, the SASHA project partners, through the graphical software arKItect® have implemented a design process coupling the system engineering process with the safety engineering process. They address especially automotive area through the ISO 26262 standard that appears as an answer for a unified requirements set to fulfill in the purpose of safe vehicle design. The cited standard needs a combined approach to be implemented (workflows, administration, models representation. This paper aims at showing how this safety engineering process is integrated in the whole system design process as proposed and implemented in SASHA project including the system specifications phase and the system design process. This enables to perform the system risk analysis, which is the second step in the safety engineering process.