Every building project beyond the simplest scope requires multiple design professionals working in parallel. Structural engineers, MEP consultants, fire protection specialists, acousticians, elevator consultants, curtain wall experts. Each one produces drawings, specifications, and (increasingly) BIM models that must fit together into a single constructable building.

That fitting-together process is consultant coordination. When it works, you get clean documents, smooth permitting, and a construction phase without costly surprises. When it fails, you get ductwork running through structural beams, sprinkler heads colliding with light fixtures, and change orders that blow up the budget.

Clash detection is the technical mechanism that catches those collisions before they reach the field. Using BIM software, the architect overlays models from every discipline and runs automated checks that flag geometric conflicts. A duct passing through a beam. A pipe occupying the same space as a conduit. These are "clashes," and finding them on screen instead of on site can save thousands of dollars per occurrence.

For the ARE, you need to understand consultant coordination as both a management process and a technical workflow. That means knowing who coordinates whom, what contractual framework governs subconsultant relationships, how BIM Execution Plans set expectations, and when clash detection fits into the project timeline. PcM focuses on the practice management side: risk allocation, liability, insurance implications, and the processes that keep a multi-discipline team moving toward a shared goal.