---------------------------------------------------------------------***--------------------------------------------------------------------Abstract In a competitive environment, the most successful companies are those that well manage their projects defining the right map to achieve their goals and optimizing the triptych “cost-quality-time limit” without ignoring the actual sustainability requirements. A lot of studies and production system’s experiences are introducing lean production as the direct implementation of lean tools or some of them. However considering a new product manufacturing a new project will summarize many processes and make its management easier especially when the project management becomes lean. In this paper we try to come up with a sustainable hybrid model optimizing and controlling all processes, defining essential values and steps to well manage a manufacturing project generally and draw lean project chart for both conception and production methods to optimize a new product manufacturing based on a case study for steel parts production system . This major project cannot be lean without the integration of lean culture in project management including maintenance projects. Finally a detailed chart of lean maintenance project is proposed which can be generalized for any other industrial production system.