Autodesk Navisworks

3D review software that federates discipline models to find clashes before they hit the field.

Quick Answer

Autodesk Navisworks is 3D model-review software made by Autodesk. It combines models from multiple disciplines into one federated model to run clash detection, 4D schedule simulation, and quantity review. Navisworks reviews and coordinates models rather than authoring them, which makes it a mainstay of BIM coordination during design and preconstruction, catching conflicts on screen before they become costly field problems.

The Full Picture

Navisworks exists because modern buildings are designed by many disciplines in separate models — architecture, structure, mechanical, electrical, plumbing — and those models inevitably conflict. A duct runs through a beam; a pipe crosses a light fixture. Finding those clashes in the field is expensive; finding them on a screen during coordination is cheap. Navisworks is built to do the latter.

Mechanically, Navisworks aggregates models from Revit and many other formats into a single lightweight federated model that opens fast even when the combined data is huge. Its clash-detection engine tests geometry from different disciplines against one another and reports interferences by type and severity. It can also link the model to a schedule for 4D sequencing and extract quantities.

In AEC workflows a VDC or BIM coordinator runs weekly clash cycles in Navisworks during design and preconstruction, publishing clash reports and viewpoints the design team resolves. It's a review and communication hub for coordination meetings, not a place where the model is edited — corrections go back into the authoring tools.

Navisworks sits downstream of authoring and upstream of construction, in the coordination layer. That position is exactly why it's often confused with design tools: it consumes models but never creates them, and its output is a coordinated, conflict-checked model set the team can build from with fewer surprises.

Real Examples

→Clash detection: A coordinator federates the structural, mechanical, and plumbing models and Navisworks flags 340 hard clashes, which the disciplines resolve before the drawings are issued for construction.

→4D sequencing: The team links the model to the project schedule so Navisworks animates the build sequence, exposing a phasing conflict where two trades need the same area at once.

→Coordination meetings: Saved viewpoints of unresolved clashes drive the weekly coordination call, giving each discipline a clear, visual punch list of conflicts to fix.

Common Misconceptions

People assume: Navisworks is a design or modeling tool like Revit.

Actually: Navisworks reviews and coordinates models; it doesn't author them. You can't design a building in Navisworks — it aggregates models made elsewhere to check them. Edits happen back in the authoring tool, then are re-imported for the next clash cycle.

People assume: Navisworks clash detection is the same as document coordination.

Actually: Navisworks finds geometric clashes between 3D models. It won't catch a missing spec section, an inconsistent note, or a conflict that only exists in 2D drawings and text. Model clash and document review are complementary but different checks.

Does MeltPlan Solve This?

Partially — adjacent

MeltPlan doesn't do 3D model clash detection — that's exactly what Navisworks is for. The complementary angle is real: Navisworks coordinates disciplines inside 3D models, while MeltPlan reviews 2D drawing sets and specs to catch missing requirements, revision changes, and coordination conflicts that live in documents and text rather than model geometry. Teams that model use Navisworks; teams working from PDFs and DWGs use MeltPlan for document-level review.

Catch coordination issues in 2D drawing sets →

Frequently Asked Questions

Who makes Autodesk Navisworks?

Autodesk makes Navisworks. Autodesk acquired the original Navisworks product in 2007 and has developed it since as its main model-review and clash-detection tool, sold as Navisworks Manage and Navisworks Simulate.

What is Navisworks used for?

It's used to combine discipline models into one federated model, run clash detection to find interferences, simulate the construction sequence in 4D, and extract quantities — mainly for BIM coordination during design and preconstruction.

Is Navisworks free?

Navisworks Manage and Simulate are paid subscriptions or come bundled in the Autodesk AEC Collection. Autodesk also offers Navisworks Freedom, a free viewer that opens and navigates published NWD/NWC files but can't run clash detection or edit content.

What's the difference between Navisworks and Revit?

Revit is a BIM authoring tool where you design and model a building. Navisworks is a review tool that aggregates models from Revit and other software to coordinate them and detect clashes. Revit creates the model; Navisworks checks it.