Translate the following English sentence to French:
"At the same time, the wealth of material in his report should be closely studied and taken as the starting point for the changes which need to be made to the modus operandi of the Community institutions."
Parallèlement, la richesse du contenu de son rapport devra faire l' objet d' une étude scrupuleuse et constituer un point de départ pour les indispensables réformes du fonctionnement des organes communautaires.