Application of functional specification and operational safety conventional methods for a networked control system suitable qualitative analysis

Networked control system functional analysis makes it possible to define studied system material limits, to carry out various functions and operations and to study various configurations of exploitation. This stage which makes it possible to carry out hierarchical system decomposition in material elements and/or software does not bring information on modes of failure, their effect, their occurrence and their criticality. It is thus necessary to supplement it by a second analysis taking of account dysfunctions. These two types of analyzes which constitute qualitative analysis, are complementary, and make it possible to model more accurately a networked control system. The goal of this paper is to apply various traditional methods employed in functional specification and operational safety in order to make a relevant qualitative analysis of a networked control system.