Enhancing the safety of any production system is a very important aspect in industries nowadays since it greatly reduces losses of resources. Moreover, safety ensures the health of the workers and a risk free environment. Often, most industries integrate safety in the useful life or during maintenance of their production systems. But this approach which is costly and sometimes causes the destruction of the existing system, seems to be irrelevant. A better solution is to consider safety in the process design of production system installation. To fulfill this aim, both probabilistic modelling of technical safety and modelling by Safety Features (SaF) give a better opportunity, and a step by step methodology to design safety production systems are proposed in this work. In order to be efficient in this approach, both proactive and reactive information are needed, and Safety Features (SaF) should be tools to sustain safety actors' view in design collaborative communication. A case study has been lunched for illustration in hydroelectric power dam in Cameroon.