Building Information Modelling (BIM) has been a popular topic across the industry for a decade, and it has recently received a lot of attention. The benefits of implementing BIM are being felt throughout the industry. Through improved communication, visualization, coordination, and information retrieval, design teams are realizing increased time efficiency and profitability on projects. Manufacturers can supply accurate, information-rich BIM objects that can be fully integrated into the BIM, allowing for optimal product placement and utilization for their projects, specification consistency throughout the project, and proper maintenance throughout the life of the building. Clients can simulate and confirm design outcomes during the briefing and design stages, allowing for maximizing a building's lifetime performance and higher efficiencies to be delivered.

The use of BIM is included in the major deliverables, giving organizations time to upgrade their skills for complex projects. When it comes to post-completion BIM, facilities management professional bodies still need to provide some direction in order to create the "pull factor." The industry requires their knowledge on how to maximize the benefits of BIM in operation in order to allow connectivity between Revit, CAFM (Computer-Aided Facilities Management), and Computerized Maintenance Management System (CMMS) tools.

Many underlying systems are involved in the delivery of a building, including the operating expenditure, exterior impacts of construction activity, just-in-time deliveries, and on-going influence on adjacent companies both during construction and following a fresh inflow of local population. Building Information Modelling allows these huge economic systems to be linked at a higher level above the coordination of different building systems and components. 

As the industry develops and records more and more BIM and energy monitoring data and these two exercises become progressively complementary, with energy modeling serving as the core element. Many of the data points needed to develop an energy model are provided by building information modeling. The type of data required for energy modelling is different from that which is encapsulated by a model for construction or architectural development; it focuses less on junctions between fabric components and more about HVAC zoning and thermal performance.

Importing and exporting from BIM can be difficult. With geometric data, this is now considerably smoother than with an HVAC simulation. Furthermore, when an energy model is created, spaces or zones with the same occupancy and HVAC profiles are linked together, but when the data is exported from BIM, each of those zones is exported independently. This causes a problem in terms of increased rendering time because the number of independent zones is typically highly dependent on it.

The majority of a building's lifetime is spent in operation; however, BIM is not currently an effective tool post completion. The model's operation, maintenance, and facilities management should be considered during the design phase and kept in mind as the model is set up and developed.

Reference:

https://www.fm-house.com/wp-content/uploads/2014/12/Benefiting-from-BIM.pdf