From analysis to design ownership: why we added Plant 3D.

Consider what happens when a clash resolution moves a line. The design office reroutes it, issues a revision, and the model is clash-free again. But the reroute changed a support location, which changed a support load, which may matter to the structure — and the person who knows whether it matters works somewhere else.

In practice one of three things happens. The question is raised, sent out for check, and the project waits. The question is not raised, because nobody in the design office recognised the implication. Or the design office makes a conservative assumption to be safe, and the structure carries steel it does not need.

None of these is a failure of competence. They are all consequences of the interface.

IDAC already had the harder half. Analysis capability, structural judgement, code knowledge and a review culture are difficult to build and slow to mature. Plant modelling capability is more tractable: the constraint is one genuinely scarce hire — someone who has built a specification and catalogue library from nothing rather than worked inside one — plus disciplined setup and competent designers.

Adding design to an analysis practice is therefore a much shorter path than adding analysis to a design practice. Most plant design offices cannot make this move; they would have to acquire doctoral-level simulation competence, which is not a hiring problem so much as a decade-long one.

The loop shortens. A layout question with a stress or flow implication is answered in the same office, usually the same day, without a commercial conversation about scope.

Accountability also consolidates. When design and verification sit in one organisation, there is no argument about whether a problem originated in the design or the check. That is occasionally uncomfortable for us and consistently better for the client.

There is one thing this arrangement cannot do, and we would rather state it than be asked. A firm cannot provide genuinely independent verification of its own design. Where a project needs independent third-party review, we will say so and recommend a different reviewer — the same position we would take if someone asked us to review a design produced by a sister company.

Independence you have to explain is not independence.