We understand that this cooperation at the beginning of the realization of the project facilitates the proper relations among the different actors of the project and increases the chances of ultimate success in all phases. "In many cases projects are incomplete or lacking in definition, technical solutions are scarce at a project level and therefore aimed to be defined in work. Bearing in mind, moreover, that builders tend more to outsourcing, that every time there is less staff specialized, that deadlines are shorter to avoid indirect costs and that casualties are high, especially in public works, the result has a direct impact on the quality of the works." We will take care that the project complies faithfully the instructions and regulations. We advise management on changes that occur during the work and recommend solutions to technical problems, helping to find the less expensive and more suitable.