Information requirements (OIR / PIR / AIR)
The cascading statements of what information is needed — organizational, asset, project, and exchange.
Information requirements, in ISO 19650, are the hierarchical statements of what information is needed, at what granularity and for what purpose — descending from an organization's goals down to each individual exchange. There are four: OIR (organizational), AIR (asset), PIR (project) and EIR (exchange).
They cascade. The OIR sits at the strategic level and feeds both the AIR (what is needed to operate a specific asset) and the PIR (what is needed to deliver a specific project). The AIR and PIR together inform the EIR for each appointment, and the EIR then defines the concrete exchanges that drive the models and deliverables during delivery.
Two of them anchor the models: the PIR generates the Project Information Model during design and construction, while the AIR defines the information for the Asset Information Model used in operation — and at completion the PIM is handed over and populated as the AIM according to the AIR. The basis is ISO 19650-1, which sets out the hierarchy. In Italian they are the requisiti informativi — organizzativi (OIR), dell'asset (AIR), di progetto (PIR) — with the EIR mapping to the Capitolato Informativo.
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