A fire safety engineering code, SCHEMA-SI, was developed with the goal to design fire safety in buildings with a performance-based approach. The originality with the current practice is to associate dynamically human behaviour, human displacement, fire dynamics and features in interaction, thanks to coupled models and stochastic approach. This paper presents the associated principle and the code structure. We focus here on the differences with the first version already presented. Then, this paper presents a case study in an auditorium. In this application, SCHEMA-SI allows to design a fire safety strategy combining soft and hard features, in other words organizational and technical features. It demonstrates that soft features have a strong impact on fire safety performance. Moreover, in the presented case study, isolated technical features may not lead to the required fire safety level, it is necessary to associate them to organizational features.