ISO 29481-1:2025

Overview

ISO 29481-1:2025 - "Building information models - Information delivery manual - Part 1: Methodology and format" defines a standardized methodology and presentation format for Information Delivery Manuals (IDMs). The standard prescribes how to document a use case, its business context, and the exchange requirements needed for information exchanges at identified times during the life cycle of assets (both buildings and infrastructure). Its goal is to promote reliable, repeatable and interoperable information exchange across BIM workflows and software applications.

Key topics and technical requirements

• IDM components: an IDM consists of three core parts - the use case description, the business context (process and interaction maps), and the exchange requirements that specify what information must be delivered, when and by whom.
• Methodology and format: prescribes a natural-language format and metadata conventions to document exchange requirements so stakeholders and software can interpret them consistently. (See clauses 4–5 for IDM framework and common metadata.)
• Business context mapping: uses process maps and interaction maps to define roles, responsibilities and the timing of exchanges across the asset life cycle.
• Exchange requirements detail: includes definitions of information units, information constraints, and the structure of an exchange view to support technical implementation.
• Technical implementation guidance: provides an interaction framework and guidance for exchange-view definition to assist software developers and implementers (clause 6).
• Applicability: covers building and infrastructure assets, supports contractual and non-contractual processes (e.g., regulatory compliance), and can be applied to any information-management trigger event.
• Supportive annexes: development guidelines, simplified examples, BPMN usage, and interaction symbols help practical IDM creation.

Practical applications and users

• Project clients and asset owners: to define clear exchange requirements and levels of information need across procurement and asset management phases.
• Designers, contractors and facility managers: to understand what information they must deliver, when, and in what form.
• Information managers and BIM coordinators: to create IDMs that align business processes with technical deliverables and quality control.
• Software vendors and integrators: to implement IDM-based interoperability, create import/export tools, or automate compliance checks.
• Regulators and standards bodies: to harmonize information exchanges and ensure consistent digital collaboration practices.

Related standards (context)

ISO 29481-1:2025 is aligned with and complements standards such as ISO 19650 (information management/BIM), ISO 16739-1 (IFC data model), ISO 29481-3 (machine-readable IDM), ISO 21597 (linked data packaging) and ISO 12006-3 (taxonomies). While IFC and ISO 16739-1 are common implementation formats, ISO 29481-1 allows any information format that satisfies the specified exchange requirements.

Keywords: ISO 29481-1:2025, Information Delivery Manual, IDM, BIM, building information models, information exchange, interoperability, business context, exchange requirements.