Model Progression System (MPS) can enhance the Building Information Modeling process This publication provides information on “How Model Progression Specification (MPS) can simplifies Building Information Modeling process for owners, designers, and builders”
The MPS is a language suitable for owners, designers, and builders for identifying every component and task in the building construction procedure. The MPS makes the communication between the architect, design team, estimators and schedulers and steers the procedure of design progression. It brings all the information about the building - what components should be modeled, and to what level of detail the components are being modeled, estimated, and scheduled. It presents the efficient outline for the project stakeholders. It can be termed as written checklist that grown-up from a very representation level of detail to a high level of detail on the basis of 3D geometry, cost, and time. The predictable cost and schedule becomes more and more precise as the level of detail enhances all through the design procedure.
It arises from the need to define the representations of building elements in a BIM (it is possible to use a BIM for many purposes - costing, scheduling, performance simulation, code checking, and visualization etc.) and a framework for BIM’s precision and suitability for specific uses. MPS methodically categorize project data for every single checkpoint in the BIM practice.
Webcor Builders tied up with Vico build up the concept and submit it to the technology subcommittee of the AIA California Council’s Integrated Project Delivery (IPD) Task Force. In order to expand the usefulness of the MPS all the opinions of architects, contractors, engineers, subcontractors, owners, and software developers were taken into consideration. The AIA National Documents Committee has approved the approach, provided further development, and included it into the new E202, an exhibit, in the fall of 2008.
Besides its 3-dimentional demonstration, a great deal of information can be associated with an element in a BIM. The information can be achieved from a variety of people. As for instance, while a 3-dimentional illustration of a wall is generated by the architect, the GC may offer a cost, the HVAC engineer a U-value and thermal mass, an acoustical consultant an STC rating, etc. To deal with this variety of input, the AIA Documents Committee came up with the concept of “Model Component Author” (MCA), liable for formation of the 3-dimensional representation of the component.
Level of Detail (LOD).
In the centre part of MPS there exist the LOD definitions. It is depictions of the steps, in the course of which a BIM element can rationally progress from the lowest level of conceptual estimate to the highest level of representational precision. Five levels were sufficient to define the progression from conceptual through as-built. However, to allocate for future intermediate levels the levels are termed as 100 through 500. In real meaning, the levels are as follows:
100. Conceptual
200. Approximate geometry
300. Precise geometry
400. Fabrication
500. As-built
At LOD 100 the cost of a groundwork structure is an standard of 30 dollars per square foot and that the building requires a foundation structure. Neither dimensions nor production processes are recognized at this level of detail. At LOD 200 the rough
