“…The same authors state that if there is only one module of a kind, it must be located centrally and the others must be "strategically dispersed". Montreuil, Drolet and Lefrancois (1992), Moodie, Drolet, Ho and Warren (1994), Rheault, Drolet and Abdulnor (1995), Rheault,Drolet and Abdulnor (1996) put an emphasis on the importance of the modules distribution technique for the effectiveness of the VCMS and also on the high cost of the possible reinstallation of the modules if their distribution proves to be not efficient.…”