Bim Acronyms, Terminology and Abbreviations: learn BIM Vocabulary
The collection of the most common acronyms in BIM: here is the glossary that explains all the abbreviations you need to know to better navigate the world of BIM
If you are approaching the world of BIM, you probably often find yourself encountering a multitude of words and acronyms that are difficult to remember and, at times, even to understand. For this reason, we propose a brief glossary in which we have gathered the main BIM acronyms, along with their definitions, that you absolutely must know.
If you are starting the transition to BIM, it is essential to pair a deep understanding of terminology with the use of specialized software. For a truly BIM-based workflow, make the most of the potential of these two fundamental resources:
- a 3D BIM design software, which allows you to create detailed and accurate digital models, integrating all the necessary information to manage every aspect of the project, from design to construction. This tool is the foundation for visualizing, analyzing, and optimizing your work in a data-rich three-dimensional environment;
- a BIM collaboration platform, which allows you to share and coordinate information in real-time with all team members. With this technology, you can ensure smooth communication, reduce errors and overlaps, and ensure that every stakeholder has access to the most up-to-date information.
Adopting these tools will not only transform your approach to design but will also allow you to improve the quality of results, meet timelines and costs, and tackle projects more efficiently, innovatively, and in a coordinated manner.
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BIM Acronym and The Acronyms of BIM
The term BIM, an acronym for Building Information Modeling, has now become a fundamental concept in the construction industry. BIM represents an innovative approach to the design, construction, and management of buildings and infrastructures.
This approach is based on the use of three-dimensional digital models that integrate a series of information (architectural, structural, mechanical, temporal, geospatial, construction, etc.), which allow for a complete and detailed view of the project. It is not just simple graphic modeling, but a collaborative process that involves various professionals in the field, such as architects, engineers, builders, and managers, with the aim of optimizing the life cycle of a building, improving cost management, and reducing errors during construction.
When talking about BIM, it is important to know that the acronym does not only describe a three-dimensional model but indicates an entire information management process. There are numerous acronyms related to BIM that are essential to know in order to fully understand the technical language used in the sector. These terminologies, often specific to certain phases of the project or particular technologies, are essential for those working in the BIM context, as they simplify communication among professionals and ensure a clear and effective flow of information.
For example, the acronym BEP (BIM Execution Plan) and LOD (Level of Development) refer to fundamental tools that allow for structured and targeted project management. As we will see later, the BEP defines how BIM will be used during the project, while the LOD establishes the level of detail required at different stages of design and construction.
Another significant example is IFC (Industry Foundation Classes), an open file format for exchanging BIM models. This standard facilitates interoperability between different software and professionals, ensuring that information is transferred accurately and without data loss. Thanks to IFC, professionals collaborate more effectively on complex projects, reducing the risk of errors and improving communication among the various stakeholders involved.
It is important to note that many BIM acronyms derive from English, as BIM is a concept that originated in Anglo-Saxon countries. Therefore, it is essential to know these terms not only to apply them correctly but also to ensure effective interaction in international contexts.
Understanding BIM vocabulary
Knowing the BIM vocabulary is essential not only for the correct development of the project but also to ensure that all team members have a common understanding of the objectives, techniques, and processes involved. A good understanding of BIM vocabulary facilitates communication and reduces the possibility of errors and misunderstandings during all phases of the project life cycle.
For example, if a team is not aligned on the meanings of terms like LOD (Level of Detail) or LOD (Level of Development), discrepancies may arise regarding what to expect from a BIM model at a certain stage of the project. Another practical example concerns the use of IFC: without a clear understanding of the format, the transfer of data between different software could be incomplete or even unusable.
In addition to the need to know these terms for the proper functioning of the project, familiarity with BIM terminology is also essential for optimal time and cost management. The term Value Engineering (VE), for example, represents a project optimization process, in which various components are analyzed to reduce costs without compromising quality. Knowing and correctly applying these concepts is essential for achieving efficient and sustainable results.
Continuous training, through courses or updates, is an important part of the journey to mastering BIM vocabulary. As the construction industry is constantly changing, new terms and acronyms are regularly introduced. The BIM approach evolves in response to new technologies, software, and working methods, so it is crucial for professionals to stay updated on new developments.
BIM Terminology and Abbreviations: a BIM Dictionary
BIM terminology includes a wide repertoire of technical terms and fundamental concepts that go beyond simple acronyms, embracing methodologies, processes, and essential practices for managing information within a construction project. Having a well-structured BIM glossary is essential for navigating the specialized language of the sector and for fully understanding the dynamics that govern BIM-based projects. These terms, in fact, are not just communication tools but real key elements that facilitate alignment among the various stakeholders involved, ensuring consistency and clarity at every stage of the process.
A structured BIM glossary can facilitate interoperability, a cornerstone principle of BIM. Take the example of IFC (Industry Foundation Classes), a standard for data transfer between BIM software. Understanding what IFC represents and how to use it correctly is crucial to avoid errors in exporting and importing models. This standard allows professionals using different software platforms to collaborate effectively, reducing risks and inefficiencies.
In addition to internal communication within the team, knowledge of BIM terminology is essential for interacting with clients and stakeholders.
The importance of a BIM dictionary extends beyond communication; it also encompasses training and professional growth. Knowing the most common terms and their meanings helps professionals navigate regulations, technical standards, and best practices in the industry, promoting a more conscious and strategic management of projects. Furthermore, mastery of this terminology is essential for those operating in international contexts, where BIM is often used as a universal language for the construction industry.
The terminology of BIM
The list of main BIM acronyms and terms
To support the understanding of BIM terminology, below you will find a detailed list of the main acronyms and terms used. A sort of small vocabulary to consult as needed, which we will try to expand and clarify over time, also welcoming indications, suggestions, and needs that you wish to report to us.
| ACM | Architectural Construction Model – BIM model focused on the architectural aspects of construction. |
| AEC | Architecture, Engineering and Construction – Commonly used expression internationally to indicate the construction sector. |
| AIA | American Institute of Architects – www.aia.org |
| AIM | Asset Information Model – In the BIM process, various project teams create their respective information models that are enriched as the project phases progress, until the complete model (federation of models) is delivered to the owner or end user. The data model is called “Asset Information Model” or AIM, once the project is delivered and complete. The AIM is for managing, maintaining, and operating the constructed asset. |
| AIR | Asset Information Requirements – Defines the Information Requirements of the Asset or real estate asset for the start of collaboration governed by the contract and for quality control of the product. It is a specific guidance tool that underlies the stipulation of a contract. |
| APEX | Advanced Planning and Execution – Advanced approach to planning and execution, integrable with BIM processes. |
| AR | Augmented Reality – Augmented reality applied to overlay the BIM model onto the physical environment during construction and maintenance. |
| AS-BUILT | The as-built model represents the actual construction of a building or infrastructure, including all changes made during construction compared to the original design. It is essential for future management and maintenance. |
| AUTHORING | Process of creating or modifying a BIM model using specialized software to design and model buildings or infrastructures. |
| BCF | BIM Collaboration Format: Developed in 2009 and maintained by buildingSMART International, it is a file format aimed at simplifying communication and information exchange among professionals collaborating on the same BIM model. It is an open format that allows the addition of comments, notes, reports, and images to a BIM model in IFC format. Everything is managed through a platform that “records” who and when added a note and a comment during the design and execution phase. It is, therefore, an exchange format not used to communicate geometric information, but of a graphic/descriptive nature capable of illustrating and facilitating the issues to be resolved, bypassing proprietary formats and workflows. |
| BEP | BIM Execution Plan – This is a document prepared by the contractor that details how the aspects of the project’s information model will be accounted for in the execution of the design and construction phases; in other words, the BEP is the contractor’s response to the requirements contained in the EIR. Operationally, two types of BEP must be prepared: the pre-contract BEP (by each bidder) and the post-contract BEP (by the winning bidder). |
| BIM | Building Information Modeling // Model // Management – An acronym whose meaning has evolved over time. The universally accepted meaning today is Building Information Modeling, referring to the process of designing, constructing, and managing a building (or infrastructure – more generally an engineering work) carried out using object-oriented electronic information. |
| BIM COLLABORATION | Collaboration among professionals and disciplines through BIM. |
| BIM INTEGRATION | Integration of BIM processes and models into business workflows. |
| BIM WORKFLOW | Set of steps and interactions between teams, tools, and processes that use BIM to achieve project objectives. |
| BMS | Building Management System – Integrated building management systems with BIM data to optimize operational efficiency. |
| BOQ | Bill of Quantities – Metric computation directly derivable from the BIM model. |
| bSI | Building SMART International – International non-profit organization, open and independent. The association is structured into “Regional Chapters” (representing states or groups of states), and brings together entrepreneurs, property owners and/or managers, software and building material producers, government agencies, research entities, etc. Its mission is to influence the development of the construction industry economy through the creation and dissemination of open and shared standards that facilitate the exchange of construction-related data among various industry operators. Promoter of the IFC standard. Originally named the International Alliance of Interoperability (IAI), it later changed its name. www.buildingsmart.org – www.buildingsmart-tech.org |
| BSI | British Standard Institution – Standardization body of Great Britain. Founded in 1901, it is the oldest standardization body in the world – www.bsigroup.com |
| CAD | Computer Aided Design//Drawing//Drafting – Field of computer science that deals with the development of software technologies aimed at supporting the drafting of technical drawings or, more generally, design. (computer-aided design // computer-aided technical drawing). |
| CAPEX | CAPital Expenditure – Capital expenditures. For an economic operator, it represents the cash outflow for making investments in operational fixed assets (investments in fixed capital). In other words, it is the financial commitment that will be required for the construction of a real estate asset. |
| CDE | Common Data Environment – Unique source of information for a specific project or property. It is a structured IT environment used to collect, manage, and distribute all data related to the project or asset of interest. |
| CIC | Construction Industry Council – Representative body of professional organizations, research organizations, and business associations in the British construction sector. Founded in 1988, it plays a significant role due to its wide representation and commitment to the development of BIM in Great Britain. – www.cic.org.uk |
| CIM | City Information Modeling – Extension of BIM for modeling and managing urban infrastructure. |
| CLASH DETECTION | Technique used to identify and resolve interferences or conflicts between different disciplines (architecture, structures, systems) within the model, reducing errors during construction. |
| CLASH DETECTION REPORT | Report documenting the conflicts identified in the federated models during the clash detection process. |
| COBie | Construction Operations Building Information Exchange – Format for the exchange of non-graphic information necessary for the management phase of the constructed real estate asset. Defined in 2007, it was updated and approved in 2010 (COBie2); in 2011 it was included by NIBS within the National BIM Standard (NBIMS-US). It has formats suitable for both automatic and human reading. The use of the COBie format, in summary, allows the sharing of all information useful for managing the property while maintaining all mutual correlations thanks to the structuring of the same within the xml spreadsheet. The use of this tool is particularly important also in the context of cost evaluation, a fundamental activity of facility management as it allows assessing the convenience of investments aimed at managing real estate assets; identifying management choices for real estate assets based on this parameter indeed requires the most reliable data possible, as well as methods to systematize and organize such data, in order to optimize available resources, an activity in which the BIM approach represents today a highly effective tool. |
| COLLABORATIVE WORKING | Fundamental principle of BIM that emphasizes the sharing and coordination of information among all project members, improving efficiency and quality. |
| CONSTRUCTION MANAGEMENT | Application of BIM methodologies to plan, coordinate, and monitor construction processes, reducing risks and inefficiencies. For more information, read: “What is construction management?“. |
| CONSTRUCTION SEQUENCING | Use of BIM to simulate and plan the order of construction activities, minimizing delays and optimizing resource use. |
| COORDINATION MODEL | Combined model that integrates multiple disciplines (architecture, engineering, systems) to ensure consistency and coordination among the different parts. |
| DATA DROP | Moment when project data is delivered to the client or other stakeholders, often corresponding to specific phases of the project lifecycle. |
| DATA VALIDATION | Quality and consistency control process of BIM data with respect to project requirements. |
| DIGITAL TWIN | Digital replica of a building or infrastructure that updates in real-time through sensors and operational data, improving management and maintenance. To learn more, read: “Digital Twin: what it is, how it works, what are the advantages”. |
| DXF | Drawing eXchange Format – File format used for exporting and importing data between CAD programs |
| EIR | It is the document that initiates the contract and defines the basic requirements related to the exchange of information between the client and the contractor. It serves as the substantial reference document for information exchange during the contractual phase and throughout the project duration. In UNI 11337, it is referred to as the Informative Specification. Through the EIR, the proposing organization can define:
To learn more, read: Exchange Information Requirements: what is the EIR in BIM?. |
| ERP | Enterprise Resource Planning – Type of software aimed at planning business resources and aimed at improving decision-making processes within a company. In general, such software can integrate all major business procedures: from sales, to purchase management, inventory, customer management, accounting and tax management, etc. |
| EU | European Union – Unione Europea |
| FEDERATED MODEL | Combination of multiple disciplinary models in a single work environment to ensure project consistency while maintaining the independence of individual disciplines. To learn more, read: “Federated BIM models, what are they“. |
| FM | Facility Management – It is the management of real estate in its broadest sense, that is, both from a material point of view (ordinary and extraordinary maintenance of structures and systems) and immaterial, that is, services (cleaning, concierge, etc.) for the purpose of its proper use and maintenance of value and/or expressible income. |
| GEOREFERENCING | Process of linking the BIM model to real geographic coordinates, ensuring that the building is correctly positioned within the territorial context. |
| GIS | Geographic Information System – Georeferencing systems integrated with BIM for territorial and contextual analysis. |
| HANDOVER | Process of transferring information and the BIM model from the design and construction team to the building management and maintenance team. |
| IAI | International Alliance of Interoperability – An acronym that is now outdated, used by the current “building SMART International” (bSI). Derived from the name of the association at its inception (1995 – “Industry Alliance of Interoperability”), it later took on the meaning of “International Alliance of Interoperability” following an initial change in the association’s name, which occurred in 1996. |
| ICT | Information and Communication Technology – Information and Communication Technology |
| IDM | Information Delivery Manual – Developed by buildingSMART International, it is a methodology for defining processes and related information flows throughout the entire lifecycle of a construction. |
| IDP | Information Delivery Planning – It is the plan that defines the scheduling of delivery management and is drafted during the offer formulation phase to be further detailed after the assignment of the contract. It represents a fundamental step for the appointed party and is preparatory to the drafting of the offer, the information management plan (BEP), and the verification of the correct execution of the contract (drafting of the PIM). The request for the IDP in the Informative Specification (CI/EIR), as an integral part of the offer, ensures greater choice and control capacity by the proposing party (appointing party) during the awarding phase, and obliges each competing/appointed party to formulate carefully verified information management plans based on their actual timelines, real capabilities, and available and usable resources. It consists of:
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| IFC | Industry Foundation Classes – structured data model (published by building SMART International), object-oriented, open, public, and independent of any software producer. Adopted in the ISO 16739 standard, it is the most widely used data exchange format between BIM applications. |
| IFD | International Framework for Dictionaries – Developed by buildingSMART International, it is an international dictionary whose purpose is to clearly define the definitions and related meanings of entities, products, and processes in the construction industry. (see art. “BIM and IFC: software interoperability and buildingSMART International“) |
| INFORMATION MODEL | Complete representation of all project-related data, organized in an accessible and usable format. |
| INTERDISCIPLINARY COORDINATION | Management and coordination among various design disciplines (architecture, structures, systems) to ensure the consistency of the BIM model. |
| INTEROPERABILITY | The ability of different software platforms and systems to communicate and exchange BIM information without data loss. |
| IOT | Internet of Things – Sensors and devices connected to the BIM model for real-time monitoring and maintenance. To learn more, read: “What is IoT in BIM”. |
| IPD | Integrated Project Delivery – Collaborative approach that leverages BIM to align the interests of all parties involved in the project, improving efficiency and reducing conflicts. |
| ISO | International Organization for Standardization – International non-governmental and independent standardization body, established in London in 1946; currently, the Central Secretariat is based in Geneva. ISO is a network composed exclusively of national standardization bodies, one for each country, and currently has 163 members. – www.iso.org |
| IT | Information Technology – Information Technology |
| ITC | Information Technologies in Construction – Information Technologies in the construction sector |
| LOD | Level Of Definition // Development – Commonly used acronym encompassing the level of detail of the model (LoD) and the level of information of the model (LOI). In other words, the level of development is defined based on both graphic and non-graphic attributes |
| LOD | Level Of Detail – Level of Detail of the Model, indicates the graphic content of the model at each planned phase of its development |
| LOI | Level Of Information – Informational Level of the Model, indicates the NON-graphic content of the model at each planned phase of its development |
| MAINTENANCE PLANNING | Planning of building maintenance using BIM model data to predict and optimize future interventions. |
| MEP | Mechanical, Electrical and Plumbing – Commonly used expression internationally to indicate the plant aspects in civil engineering interventions |
| MODEL CHECKING | Automatic verification of the consistency, quality, and compliance of the model with specific standards and project requirements. To learn more, read: “Model checking in the BIM process: standard formats, requirements, and critical aspects“. |
| MODELING | Process of creating a digital model that represents a building or infrastructure, including geometric, structural, and functional information. It can be developed with different levels of detail based on the project phase. |
| MVD | Model View Definition – Developed by buildingSMART International and subject to international certification issued by it, the “model view” defines a subset of the IFC format that must be implemented in software to meet the data exchange requirements of a defined process or activity, described in the “information exchange manual” (IDM). |
| NBIMS-US | National BIM Standards – United States – Guidelines and directives from the NBIMS-US Project Committee, an initiative of buildingSMART Alliance, which is one of the committees of the National Institute of Building Sciences |
| NIBS | National Institute of Building Science – The National Institute of Building Science is a non-profit, non-governmental organization in the United States, authorized by the U.S. Congress in 1974. The institute is based in Washington D.C. and brings together representatives from government, professions, industry, and consumers to identify and solve problems or potential issues that hinder the realization of safe, affordable construction for housing, industry, and commerce. The institute is organized into a series of councils and permanent committees, including “building SMART Alliance” – www.nibs.org |
| NIST | National Institute of Standards and Technology – Agency of the U.S. Department of Commerce. Frequently remembered for a document issued in August 2004 (Cost Analysis of Inadequate Interoperability in U.S. Capital Facilities Industry) related to the costs of inadequate interoperability among various sectors in the U.S. construction industry, cited in numerous seminars and conferences on BIM, supporting the economic feasibility of its adoption. – www.nist.gov |
| O&M | Operation and Maintenance – Operational management of a building or infrastructure using BIM data to improve efficiency, safety, and performance. |
| OIR | Organizational Information Requirements – Information requirements of an organization used as a basis for BIM. |
| OPEN BIM | An approach that promotes the use of open and interoperable file formats, such as IFC, to facilitate collaboration among different disciplines. To learn more, read: “open BIM what it is and how to put it into practice“. |
| OPERATION PERFORMANCE | Assessment and optimization of a building’s performance during its operational phase, using BIM data to monitor energy consumption, comfort, and maintenance. |
| OPEX | OPerational Expenditure – Operating expenses. For an economic operator, it is the cost necessary to manage a product, business, or system. In other words, it refers to O & M costs (Operation and Maintenance), that is, operational and management costs. |
| PARAMETRIC MODELING | Modeling approach that uses parameters and rules to define the geometry and properties of objects, allowing dynamic updates to the model based on data changes. |
| PAS | Publically Available Specification – British standards published in a public evaluation stage, issued to provide a quick response to specific needs of defined production sectors. The PAS series 1192 (parts 2, 3, 4, 5), designed as a development and evolution of BS 1192:2007+A3:2016, were published in response to the British government’s need to implement the adoption of BIM methodology in the national construction industry. They are freely downloadable from knowledge.bsigroup.com/categories/building-information-modelling-bim |
| PIM | Project Information Model – In the BIM process, various project teams create their respective information models that are enriched as the project phases progress, until the complete model (federation of models) is delivered to the owner or end user. The data model is referred to as the “Construction Information Model” or PIM during the design and construction phase. |
| PIR | Project Information Requirements – It is a planning tool that defines the Project Information Requirements that the organization sets. It is highly dependent on the project and indicates what information is necessary to properly manage the project. It can involve various fields of project development:
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| PROCESS OPTIMIZATION | Simplification and improvement of design, construction, and management processes through the use of BIM. |
| QTO | Quantity Take-Off – Automatic extraction of quantities of materials and components directly from the BIM model for estimation and procurement purposes. |
| QUALITY ASSURANCE | Process aimed at verifying that the BIM model and related information meet quality standards and project requirements. To learn more, read: “What is quality assurance in construction?“. |
| RACI | Responsibility Assignment Matrix – Matrix used in project management to define roles and responsibilities. |
| REALITY CAPTURE | Integration into BIM of data collected in the field using technologies such as laser scanners or drones, to accurately represent the existing conditions. |
| RENDERING | Creation of photorealistic images from the BIM model, used to present the project to clients or stakeholders. |
| RIBA | Royal Institute of British Architects – www.architecture.com/RIBA |
| ROI | Return of Investment – Return on investment. Profitability index on the invested capital. |
| SCAN TO BIM | Process of creating a BIM model based on physical surveys obtained from laser scans or photogrammetry. To learn more, read: “Scan to BIM, from laser scanner survey to the BIM model“. |
| SIMULATION | Use of the BIM model to simulate aspects such as construction, energy performance, or safety, in order to optimize the project. |
| UNI | Italian National Unification Body – The Italian National Unification Body, founded in 1921, is a private non-profit association recognized by the state and the European Union. UNI represents Italy in European (CEN) and global (ISO) standardization organizations. www.uni.com |
| VDC | Virtual Design and Construction – Virtual design and construction method based on BIM. |
| VE | Value Engineering – A systematic approach aimed at improving the value of a project or product by optimizing the relationship between functionality and cost. In the context of BIM, the VE approach leverages model data to identify design solutions that reduce costs and increase efficiency without compromising quality or performance. |
| VIRTUAL CONSTRUCTION | Use of BIM to virtually simulate the construction process, identifying and resolving issues before actual work begins. |
| VISUALIZATION | Creation of graphical representations of the project to enhance understanding and engagement of stakeholders. |
| VR | Virtual Reality – Virtual reality for immersion and visualization in BIM models. To learn more, read: “VRI, immersive virtual reality in architecture |
| WBS | Work Breakdown Structure – Hierarchical representation of the work to be done in a project, divided into manageable and detailed components. |
