A complete absence of clashes on a large multidisciplinary retail project is more likely to indicate an input or positioning problem than perfect coordination. The BIM manager should first confirm that every published model uses the approved shared-coordinate system and appears in the correct horizontal position, elevation, and orientation. Models exported using unrelated internal or project coordinates may be separated by a substantial distance in the coordination space, preventing the clash engine from detecting intersections.

After correcting the source models, the teams should republish the designated coordination views and verify visually that the architectural, structural, and building-services models overlay correctly before rerunning clash detection. Publication status, model versions, included geometry, and coordination-space assignments should also be checked.

Adding sheets does not affect three-dimensional clash detection because sheets are documentation containers rather than coordinated model geometry. Proceeding on the assumption that zero results means zero issues would bypass essential input validation. A case study would be inappropriate until the unexpected result has been investigated and confirmed.

The governing principle is that clash results are only reliable when the model inputs, coordinate systems, publication settings, and federation are validated first.

Reference topics: Shared coordinates; model publication; coordination-space validation; clash-detection inputs; federated-model positioning; quality assurance.

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