A requirement must be verifiable

On many projects, BIM requirements live in text documents. Those documents are useful, but they often leave room for interpretation: which property must be filled in, on which object type, in what format and at which project phase?

IDS provides a practical answer. Part of the requirement set can be translated into machine-readable rules. A door may need a fire rating. A space may need a net area. Equipment may need a property used for maintenance.

What IDS clarifies

The IFC classes affected by a requirement.
The expected properties and where they belong.
Accepted values or required formats.
The project phases when information becomes mandatory.
Issues that must be corrected before coordination or handover.

This clarity reduces late discussion. Teams no longer ask only whether information exists somewhere; they know where it must be and how it will be checked.

A tool for dialogue, not only compliance

An IDS file is valuable only when it reflects a useful project requirement. It should therefore be connected to real use cases: coordination, cost, operations, maintenance and owner handover.

In Switzerland, IDS is especially useful when linked to eCCC-Bât / CFC classifications, digital handover requirements and IFC property controls. It turns a difficult-to-follow requirement document into a measurable delivery framework.

The limit to remember

IDS does not replace modelling quality. It checks part of the information. Teams must still assess professional consistency, value relevance and whether the data can actually support operations. Used well, IDS creates a common language between the requirement, the model and the audit report.