3. Fields of application

In other economic sectors, eco-design is applied to a stable product. In construction, the object of this methodology can have different morphologies. Indeed, the built environment is a system that can be analyzed differently depending on the perimeter taken into account. It may be a district, a building or, more simply, a component. Each of these studies has its own specificities.

• In physical terms, the elements are of course different. They multiply as the perimeter expands, and their nature is enriched.

  In addition to buildings, the nomenclature includes infrastructures, networks, public spaces and a wide range of equipment. Each of these, however, is the result of a combination of materials that are quite similar to one another.

• From a functional unit...