How is it that we often talk about the 3/5 / 999D model, despite the fact that we are talking about the same building? Let's see, what the differences and similarities of these models are.
Let's start with, what a 3D model is. Term "3D" (3-dimensional) is very often encountered when we talk about real material things or modelling objects in three-dimensional space. In our case, this is a three-dimensional digital image of the required object (buildings, facilities, parts, mechanism), a visualized digital copy. Design provides for creation of complex engineering systems, so the model must be coordinated, checked for collisions and contain correct engineering solutions. 3D modelling may also consider environment effects (sun, wind, precipitation).
According to the results of this work, detailed design documentation is prepared to be used during the construction of the object. Thus, BIM 3D is a coordinated digital model.
If the start and end date of erection is assigned to each element based on the information in the model, we will get a dynamic 4D model(3D + time). With the help of the 4D model, we can manage the logistics of a construction site, create calendar and network schedules. Using the capacities of modern BIM programs and/or VR technologies, specialists create a visualization of construction processes.
You can enter the information about the cost (elements, works, joints, equipment, etc.) into the 4D model and get an output BIM 5D model(4D + money), getting an idea of the financial part of a project. Such a model is useful for understanding and forecasting cash flows and makes it much easier to control the cost. 5D model makes it possible to write out scope of materials / works / equipment to model the expenses.
Upon the construction process completion, the model developers make adjustments based on the structural element erection results. An updated model with an actual state described can be used for operation and maintenance simulation - BIM 6D. It's useful for status monitoring, repair, maintenance and reconstruction. Thanks to 6D model, it is easy to control the energy efficiency of an object, it becomes possible to create an electronic passport of the object. BIM 6D - facility operation and management.
Applying the full range of BIM modelling capacities can significantly reduce construction time, save customer's funds and successfully use the model throughout the entire life cycle of a building.