Procure BIM and you first drown in acronyms: OIR, AIR, PIR, EIR, BEP, LOIN, TIDP, MIDP. ISO 19650 arranges these documents into a logical cascade — they define which information is delivered when, by whom and to what level of detail. That is what makes BIM controllable and its economics measurable.
The information cascade at a glance
Three levels build on each other — the organisation's strategy, the requirements for the finished asset in operation, and the project-specific requirements with their delivery plans:
Why the order matters
The cascade is requirement inheritance: the OIR shapes AIR and PIR. From the PIR and project context comes the client's EIR, whose per-element detail is set in the LOIN. The delivery team answers with the BEP and plans delivery through TIDP (per team) and MIDP (overall). Skip a step and the next one loses its basis — the most common cause of costly change requests.
Guided, not a blank page
Instead of editing a Word template, you answer targeted questions per document type. Requirements flow automatically from upstream to downstream documents (e.g. from the EIR into the BEP). The result: a consistent, ISO 19650-compliant document as DOCX/PDF.