2. Establish the system's physical architecture

Unfold and iterate the following activities.

Look for concrete components or systems likely to realize/execute the elementary functions and transport the input/output/trigger flows of the "ideal" functional architecture chosen (we speak of allocation or matrix of allocation of functions on components):

• the component or system exists and can perform the function with the expected performance: it should ;

• the component or system exists and can perform the function with performance of the same order of magnitude, but must be modified;

• the component or system exists and can perform the function with the same order of magnitude of performance, and the reuse of this component or system is imposed: assess the impact on the architecture, on the requirements,...