BIM
“Building Information Modelling”
A collection of defined model uses, workflows, and modelling methods used to achieve specific, repeatable, and reliable information results from the “Model” (See definition of “Model”). Modelling methods affect the quality of the information generated from the model. When and why a model is used and shared impacts the effective and efficient use of BIM for desired project outcomes and decision support.
BEP
“BIM Execution Plan”
A document that lays out how BIM will be implemented on a particular project as a result of the collective decision by the members of that project, with the approval of the Employer. The BIM Execution Plan is not a contractual document, but the work product of a contract.
BIM Manager
A person, firm, or corporation appointed by the Employer to coordinate the use of BIM in a project and ensures the appropriate implementation of the BIM Execution Plan among project members. Depending on the nature of the project (e.g. budget, delivery method etc), there may be more than one BIM manager in a project, and this role could be carried out by an existing project member (e.g. project manager, architect etc).
Construction Model
(See under definition of “Model’)
Design Model
(See under definition of “Model’)
Employer
The owner of the Project, including any government or statutory body.
Federated Model
(See under definition of “Model’)
Full Design Model
(See under definition of “Model’)
IFC
“Industry Foundation Class”
A vendor neutral, open data exchange specification. It is an object oriented file format developed for the building industry and is commonly used in Building Information Modelling to facilitate interoperability between software platforms. IFC was originally developed in 1995 by a group of American and European AEC firms and software vendors through the International Alliance for Interoperability (IAI). Since 2005 it has been maintained by buildingSMART International.
Interoperability
In the context of BIM, it is defined as the ability to manage and communicate electronic product and project data between collaborating firms’ and within individual companies’ design, procurement, construction, maintenance, and business process systems.
Level of detail
The level of detail mentioned in this Guide is a generic description that refers to the amount of information in a BIM model element. At different project stages, the BIM model contains elements at different levels of detail (some elements require more detail than others), depending on the use of the BIM model at that particular stage.
It is important to note that the level of detail used in this Guide is not equivalent to the LOD (Level of Development) defined in the AIA E202 BIM Protocol Exhibit. (See Appendix F) For Singapore’s building industry, the specification for level of detail for BIM content is recommended to follow the current practice for respective project stages in current practice.
Model
In this guide, the “Model” shall refer to a model produced through BIM. (See definition of “BIM”) It is an object-based digital representation of the physical and functional characteristics of a facility. As such it serves as a shared knowledge resource for information about a facility forming a reliable basis for decisions during its lifecycle from inception onward.
A basic premise of Building Information Modelling (BIM) is collaboration by different project members at different stages of the life cycle of a facility to insert, extract, update or modify information in the BIM process to support and reflect the roles of each project member.
The following are Models, created as specified in the BIM Execution Plan. BIM Model Uses and content of BIM Model
Construction Model
To be used during the Construction Stage of the project Contains data from the “Design Model” and other relevant information that is useful for construction
Design Model
The stage of completion of this model is suitable to be published as 2D design drawings that can be used for tender in Design-Bid-Build projects. This model is also used in the Construction stage as reference, to develop the Construction Model.
A model that has not reached this stage of completion stated above is referred to as a “Model”.
Federated Model
One single model that contains linked but distinct component BIM models and other data entities. The different types of data within a Federated Model do not lose their identity or integrity by being linked each individual data entity can change without affecting a change in another data entity.
The difference between a “Federated Model” and a “Full Design Model” is that a Federated Model is not as fully coordinated or complete as a Full Design Model.
Full Design Model
Consists of coordinated structural, architectural, mechanical, electrical, plumbing and other Design Models of relevant disciplines, as specified in the BIM Execution Plan.
The difference between a “Federated Model” and a “Full Design Model” is that a Federated Model is not as fully coordinated or complete as a Full Design Model.
Project Model
A model consisting of one or more Construction Models together with a linked model (either Federated Model or Full Design Model).
Model Author
The party responsible for developing the content of a specific BIM model element to the level of detail required for a particular project stage.
Model User
Any individual or entity authorised to use the BIM model on the project, e.g. for analysis, estimating or scheduling.
Project Model
(See under definition of “Model’)
Principal Agreement
Agreement for services, supply and/or construction which that party has entered into for the project.
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