## 4 Conclusions  
Both the development of digital tools and the improvement of techniques that generate massive data sets contribute to the study of knowledge, the improvement of safety in construction, and the evaluation of the quality of construction elements. On the one hand, this can translate into minimizing risks in construction and improving the safety situation in the industry. The potential of 3D model reconstruction techniques, together with comparison algorithms that determine millimeter precision, establishes a mechanism for inspection and evaluation with nondestructive techniques. The evaluation process is complex in this field of research, but as on-site improvement processes are implemented in the works, all these studies represent an analysis mechanism of great scientific and professional interest, as they generate significant potential for the control of quality and safety in construction works. It should be noted that by identifying changes, mechanical deformations and stresses associated with production mechanisms can be quantified [62]. This research opens a new framework for construction risk analysis based on both BIM modelling and massive data acquisition techniques. Answers the following challenges: (i) Quality analysis in the material execution of the activity and construction of formwork systems and their safety, (ii) From the study of the DEM, define the location of the static and dynamic elements of the model. This value of the morphometric parameter of the building and the scene to be represented characterizes the morphometrics of the work execution  
Figure 20: Plot of profiles in phase 4. The coordinates of the x and y axes are in metric units and the values of the profiles are in pixel systems. activities and (iii) The last contribution of this work is to evaluate the semantic information model of the BIM construction, in which the deformations between the ideal model and what was actually executed can be determined. This process could be part of the safety planning and execution feedback in the construction process. It is concluded that the use of reverse engineering and BIM applied in the sense described in this study offers the intervening agents and especially the construction company a virtual-digital environment that undoubtedly improves the precision and possibilities of risk detection with respect to traditional methods. Furthermore, it is a clear novelty to use said digital models of the different moments of construction as precise databases for analysis for the purposes of prevention in future similar scenarios. Within the limitations of the work, an important aspect is the use of personal laser scanning equipment, whose prices are increasingly competitive but are still not accessible for small construction companies. Furthermore, these procedures require operators with specialized training in geomatics. The algorithm used may also have difficulty distinguishing and accurately tracking cloud movements, especially in dynamic atmospheric environments. In this circumstance, the process becomes complicated since point cloud filtering algorithms must be used to eliminate residual values. Therefore, it is an evident contribution to the industry that, even having at present the limitations related to the cost of the equipment, the installation time, and the assembly of the results, in the very near future they will undoubtedly be resolved. In the future, it is intended to expand the research with more complex buildings, both in size and use. For example, the development in the construction of commercial buildings, where the planning and logistics parameters are more complex than the construction of residential homes. The geographical environment can also establish very different analysis parameters where the impact of time is key for the execution of the works. Conceptualization, J.M., J.R., J.E.N.-J. and D.M.-G.; Methodology, J.M., J.E.N.-J. and D.M.-G.; Software, J.M., J.R. and J.E.N.-J. ; Validation, J.M., J.R., J.E.N.-J. and D.M.-G.; Formal analysis, J.M., J.R., J.E.N.-J.