The Autor began his professionnal carreer with an international oil company. Starting out with an interest in the Operation of Oil & Gas Facilities, his technical curiosity about their desing saw him move to engineering contractors to become expert in this area. As engineering manager of large turn-key projects, he gained the insight on engineering and amassed the knowledge presented in this work.Hervé baron is a graduate engineer from IFP school and France\'s Ecole Polytechnique.