After the main project is defined, the implementation project follows, which is the phase in which the technical aspects are elaborated in detail and the preparation for the execution of the works in the field. This step includes the development of technical specifications, selection of materials, cost estimates, and planning of construction operations. Engineers in this phase carefully monitor the implementation of the main project, ensuring compliance with regulations, safety standards and high quality standards.

It is very useful as a kind of instruction or guide for craftsmen and contractors, to make the performance easier and safer.