standard of a representative defined module of a circuit dedicated to management of a communications protocol which module has been optimized in advance for a given application the disclosure features duplicating the module with a view to generating several duplicated modules which are identical to the module and operatively connecting the duplicated modules to a network bus each duplicated module is configured differently according to definitions contained in the standard so that the set of configured modules is representative of real operating conditions of the designed circuit bus signals are applied to the network which signals are representative of frames in accordance with the standard and abnormal or parasitic signals and the respective responses from each of the configured modules are collected back for analysis application_number US 99764292 A description a few essential elements of the prior art will first of all be recalled so that the invention can be better understood the essential functions of a development tool may be briefly broken down into 1 a description of the component to be developed at a very high level vhdl 3 a symbolic generation of the circuit employing a library of modules and 4 supply of a symbolic diagram representing the circuit and its.