BIM Brief: Definition, Role and Structure

The BIM brief defines the technical and organizational requirements that govern the use of the digital model on a project. It specifies the objectives to be reached, the rules of collaboration, the file formats to be used and the methods for validating deliverables. Its role is to ensure a common understanding of the BIM process and to avoid divergences between the parties involved.

This document is built from the needs expressed by the project owner. It formalizes the expectations regarding data production and exchange, model management, and information quality control. It serves as a contractual reference throughout the project.

The BIM brief describes the BIM uses selected, the levels of development expected for each phase, the interoperability standards to be applied and the exchange protocols. It also specifies the structure of the models, the naming conventions and the model validation method. Its content must be clear, measurable and applicable by all stakeholders.

The drafting of the document is generally led by the project owner, supported by a BIM client advisor or a BIM Manager. These leaders translate the project’s needs into technical requirements and ensure consistency between disciplines. The BIM brief thus stands as a methodological framing tool that facilitates coordination, verification and traceability of data.

What is the purpose of the BIM brief on a project?

The BIM brief sets the framework for applying the BIM method on a project. It defines how stakeholders collaborate, exchange information and verify the conformity of deliverables. Its objective is to ensure the continuity of the digital process, from design through operations.

Framing collaboration between stakeholders

The document describes the organization of collaborative work. It specifies the responsibilities of each stakeholder, the tools used, the structure of the exchange system and the frequency of updates. It also indicates:

the exchange formats to be respected and the interoperability protocols;
the procedures for uploading, validating and archiving files on the common data environment (CDE).

This formalization guarantees a consistent working method and limits gaps in interpretation between the various disciplines.

Guaranteeing the consistency and quality of deliverables

The BIM brief defines the quality criteria applicable to models. It specifies the level of geometric and informational detail expected, the properties to be filled in and the checks to be performed before each delivery. The verification points cover in particular:

the consistency of objects across disciplines (architecture, structure, MEP);
the conformity of completed attributes and the absence of conflicts detected during coordination.

These requirements make it possible to control the reliability of models and to ensure the compatibility of the data produced.

Defining technical and software requirements

The document describes the technical parameters related to the production of models: software versions, naming conventions, structuring rules and conversion protocols. It can also specify the security instructions and the requirements related to data protection. These elements guarantee the traceability, durability and compatibility of digital information throughout the project.

Content and typical structure of a BIM brief

The content of a BIM brief depends on the type of project and the level of BIM maturity of the project owner. Its structure must nevertheless allow rapid access to information relating to the organization, objectives and technical requirements. A complete document generally includes several coherent parts.

Presentation of the project and BIM objectives

This first part sets out the general context of the project, its purposes and the BIM uses envisaged. It specifies the objectives to be reached, the phases concerned and the associated performance indicators. It generally includes:

the project description (typology, location, budget, schedule);
the BIM uses selected (3D coordination, estimation, simulation, operations, etc.);
the level of BIM maturity expected for each phase.

Roles and responsibilities of stakeholders

The brief identifies all the stakeholders taking part in the BIM approach. It defines their roles, their missions and their obligations regarding the production and validation of deliverables. This part often includes:

the organization chart of BIM stakeholders (project owner, client advisor, project manager, engineering office, BIM manager, contractors);
the distribution of responsibilities and the interfaces between disciplines;
the procedures for validating and transmitting deliverables.

Levels of development and expected deliverables

Each phase of the project corresponds to a specific level of development (LOD) and information (LOI). The brief describes these requirements to guarantee the consistency of the models produced. It specifies:

the expected deliverables (IFC models, derived drawings, property tables, control reports);
the delivery milestones and acceptance conditions.

Standards, formats and exchange processes

The document defines the technical standards and the exchange formats to be used. It indicates the rules of interoperability between applications and the method of data structuring. The following elements often appear:

normative references (ISO 19650, XP P07-150, PTNB guides);
exchange formats and file versions to be used (IFC, BCF, DWG, COBie);
naming conventions, object classification and folder organization.

Quality control and validation

This part describes the control methods and the acceptance criteria for models. It specifies the frequency of BIM reviews, the verification tools used and the responsibilities associated with control. The following points are generally covered:

verification of information completeness;
detection of geometric conflicts;
tracking of corrections and final validation of deliverables.

Example of a BIM brief

The example of a BIM brief illustrates how requirements are formulated and structured to frame a project. Each organization adapts the document to its scope, but the logic remains identical: clearly define BIM uses, responsibilities and associated deliverables.

Application case in a construction project

In an office building project, the BIM brief can specify that the digital model will be used for coordination between disciplines, interference detection and preparation of the construction phase. The document will indicate:

the software used for modeling and project review;
the main exchange format (often IFC 4) and the file naming rules;
the frequency of model updates on the common platform;
the verification procedures prior to model validation.

For renovation projects, the BIM brief often integrates specifications related to 3D surveys, modeling of the existing building and management of the gaps between the actual condition and the model. It specifies the data capture methods, the acceptable tolerances and the compatibility requirements between surveys and design models.

Summary structure of a sample BIM brief

A typical document can be organized according to the following sections:

Project context and BIM objectives;
Organization of the BIM approach and project governance;
Roles, responsibilities and organization chart of stakeholders;
BIM uses selected and expected level of development;
Standards, formats and tools used;
Process for control, validation and archiving of deliverables;
Conditions for updating the document according to project progress.

Each section must contain precise, measurable and applicable requirements. The level of detail depends on the size of the project and the degree of BIM integration in the organization.

How to write an effective BIM brief?

Writing a BIM brief requires rigorous preparation and a clear understanding of the project objectives. This document must be precise, actionable and adapted to the capabilities of the teams concerned. It is meant to frame the BIM process, not to complicate it.

Preparation steps

Before drafting, it is necessary to analyze the project owner’s needs and to define the BIM uses that will bring measurable value to the project. This framing phase generally includes:

identifying the purposes of BIM (coordination, operations, maintenance, etc.);
defining the scope of the BIM approach and the stakeholders concerned;
verifying the level of BIM maturity of the stakeholders;
selecting the reference frameworks and standards to be applied (ISO 19650, XP P07-150).

Once these elements are clarified, the structure of the document can be established according to the selected objectives and the project schedule.

Drafting principles

An effective BIM brief relies on the precision and consistency of its requirements. It must:

use consistent terminology recognized by all stakeholders;
distinguish mandatory requirements from recommendations;
formulate expectations as measurable, verifiable criteria;
include update procedures to adapt the document to the project’s evolution.

The objective is to provide a clear framework that allows each stakeholder to produce and exchange data that complies with the project’s needs.

Mistakes to avoid

Some practices harm the readability and effectiveness of the document:

copying a brief template in full without adapting it to the project;
multiplying technical requirements without functional justification;
omitting the description of validation processes;
neglecting consistency with the BIM protocol and the BIM Execution Plan.

A poorly calibrated brief leads to differing interpretations and complicates coordination between disciplines. Conversely, a clear, structured document promotes the consistency of deliverables and the reliability of the digital project.

BIM brief and BIM Execution Plan: what are the differences?

The BIM brief and the BIM Execution Plan are two complementary but distinct documents in their function and their moment of drafting. The first sets the requirements of the project owner, while the second describes how the project management and execution teams will meet them.

Role and timing

The BIM brief is written at the launch of the project. It expresses the needs and expectations of the project owner regarding the use of BIM, data production and the quality of deliverables. This document serves as a basis for tenders and for the selection of providers.

The BIM Execution Plan, for its part, is drafted once the stakeholders have been designated. It translates the brief’s requirements into concrete implementation methods. It describes the working procedures, file formats, coordination tools and exchange rules to be applied.

In short:

the brief defines what needs to be done;
the BIM Execution Plan specifies how to do it.

Content and scope

The BIM brief has a broader contractual scope. It applies to all project stakeholders, regardless of their role or phase of involvement. It defines the minimum obligations and the expected deliverables.

The BIM Execution Plan, on the other hand, has an operational scope. It organizes coordination between teams and details the procedures for production and validation of models. It generally includes:

the BIM organization chart of the project and the responsibilities of each;
the model exchange plan and the delivery schedule;
the quality control and version management procedures.

Complementarity of the two documents

The brief and the BIM Execution Plan do not replace each other. The first establishes the framework and the overall objectives, the second specifies its operational implementation. A good articulation between the two ensures the consistency of the BIM process and facilitates communication between the different levels of responsibility in the project.

The reference frameworks and standards to know

The application of BIM on a project relies on reference frameworks that govern the structuring, exchange and management of digital data. The BIM brief must rely on these standards in order to ensure the compatibility of methods and the quality of information exchanged between stakeholders.

ISO 19650

The ISO 19650 standard defines the international framework for information management in a BIM environment. It specifies the principles of data structuring, the validation processes and the responsibilities of each party. The BIM brief must refer to it in order to organize:

document management and file traceability;
the distribution of roles in the information process;
the definition of deliverables and their validation cycles.

French reference frameworks and standards

In addition, several national standards apply to projects carried out in France. The most widely used are:

XP P07-150: general framework for the implementation of BIM in construction operations;
PTNB and MINnD: methodological guides for data production and exchange;
Mediaconstruct: recommendations on interoperability and model structuring.

These documents provide process models, organization diagrams and common definitions to standardize practices.

Exchange formats and compatibility

The BIM brief must also specify the file formats accepted and the exchange protocols used. The main standards are:

IFC (Industry Foundation Classes) for the exchange of 3D models;
BCF (BIM Collaboration Format) for managing comments and conflicts;
COBie (Construction-Operations Building information exchange) for transmitting operations data.

Compliance with these formats guarantees compatibility between applications and the durability of information throughout the building’s lifecycle.

Additional requirements

Depending on the type of project, the brief can also integrate requirements from other reference frameworks:

security and confidentiality of digital data (GDPR, ISO 27001);
electronic archiving and traceability (NF Z42-013);
document management and file coding.

The integration of these elements makes it possible to maintain overall consistency between the BIM strategy and the regulatory obligations of the project owner.

Conclusion

The BIM brief sets the technical, methodological and organizational rules applicable to a project using the digital model. It specifies the BIM objectives, the roles and responsibilities of the stakeholders, the exchange formats and the validation procedures. This document governs data production and management in order to ensure the consistency, compatibility and traceability of information throughout the project lifecycle.