## 4 A Case Study in Milan--Italy
### Introduction
As can be seen, the complex sheet contains numerous useful pieces of information for the survey activity, such as the presence or absence of a caretaker, the number of buildings, landings, cells, and technical rooms, as well as the extent of the outdoor areas surrounding the building. These sheets allowed, during the planning phase of the survey activities, to estimate with good accuracy the extent of the sites to be surveyed. In particular, Table 1, which describes the number of environments that the project had to survey, shows the significance and scale of the surveying project. The number of staircases to be surveyed is extremely high, so this required excluding all mobile mapping instruments that require the survey trajectory to be closed or looped. This would have meant traversing more than 3000 staircases twice, many of which are more than 5-6 floors high. The number of apartments is also considerable. The project does not include the surveying of the interiors of the apartments, but for each apartment, it is required to capture a photograph and the data of the entrance door, as well as the information entered into the intercoms of these apartments. Figure 9: Example of a complex sheet. The name of the building and the address have been modified for confidentiality reasons. Typically, the administration of routine and extraordinary maintenance contracts for the buildings in a complex is conducted through an aggregated approach. Additionally, buildings within a complex often share essential services, such as the heating plant, connections for technical services such as water distribution or electricity, and garbage collection spaces, rather than individual access to parking areas and/or garages for apartment owners or residents. The data acquired in the field during the surveying process are primarily intended to update and enrich the information assets that, in the technical domain, accompany the database already available within the management information system used by MM. The asset survey should enable the following:  
* Increasing the amount of available data while correcting any errors and inaccuracies in the information system. * Providing valuable support to MM for monitoring the financial aspects and resources allocated to facility operations, evaluating and managing expenses related to building maintenance, repairs, renovations, and utilities, and ensuring the efficient allocation of resources. * Supervising and empowering contracts and service providers for various services, such as sanitation, cleaning, and security. * Conducting periodic checks, adjustments, and maintenance to ensure the smooth daily operation of the facility. * Improving the management of apartment relocations. * Overseing the proper management of essential services, including heating and water. * Ensuring that facilities comply with government regulations, health and safety standards, and energy efficiency requirements. * Supervising teams of employees or third-party workers responsible for security, maintenance, and cleaning. * Supervising the implementation of developments and improvements. * Supporting the planning of extraordinary maintenance works and optimizing the organization of contracts for the acquisition of works, products, and services. * Providing the necessary indicators for the development of detailed analyses regarding asset management performance and potential development scenarios. Based on the previously mentioned general goals, MM determined that the survey should proceed with the implementation of the most innovative technologies to ensure the following detailed results:  
* To obtain a current status of the common areas in all surveyed buildings, enabling the extraction of accurate plans of these spaces with local centimeter-level precision.