OBJECTIVES OF THE GUIDE The BIM (Building Information Modelling) methodology is an unstoppable phenomenon that is irremediably beginning to change the way in which construction has been conceived until now. Aligned with the so-called Industry 4.0 or Construction 4.0, BIM fundamentally comes to "bring order" to construction projects, establishing mechanisms that allow all participating agents (architectural firms, consulting and engineering firms, project and site management, construction companies and subcontractors, suppliers of construction materials, administrations, building and infrastructure managers, etc.) to establish more fluid communication, to establish a more efficient use of resources and to improve the quality of the construction process.) establish more fluid communication, based on the development of and access to virtual three-dimensional models of the building or infrastructure that are shared, and which contain information beyond the geometric in order to facilitate their use in the different phases of the project's life cycle.