Summary form only given. The EM topology method was developed at the end of the 1980s. Experimental validations performed during the last 2-3 years, have permitted to achieve a significant progress pertaining to the assessment of effects of electromagnetic aggressions on complex systems. Such complex cabling systems are present in automobiles (600 m of cables in one car), aircrafts or ships. The practical importance of the evaluation of these effects needs no demonstration, as the cars and airplanes are equipped, as seen above with hundreds of meters of cables through which are transmitted vital informations for the operation of the vehicle and which are submitted to external (radars, radio and TV emitters) or internal (cellular phones) aggressions