Are you working to combine Revit MEP and Navisworks?

Yes.. Revit for modelling & Navis work for co-ordination.

The word "No" is often used to express negation or refusal.

Well, I'm not sure why you wanted to combine Naviswork and Revit though. But from my experience, even though both software was under Autodesk, each one has a purpose that is essential to the job that you are to do. Like Revit, it is for creating and designing plans by utilizing our current technology to come up with the most realistic model with data / information that is build in to each model / object which an engineer / architect could manipulate to make it what they called as Building Information Modelling. While on the other hand Naviswork is more of the visualization aspect where you navigate into the 3d model that you made in revit. Although you can view the 3d aspect in Revit as well because it where the 3d plans was created. For a non Revit user, Naviswork would be much easier to use and the luxury of viewing a big plan / building and navigating around its rooms, you cant really do that with Revit if you are not using your PC or laptop. But Naviswork is so light that plans are easily viewed thru the cloud by the Engineers and Architect with just their iPad or Tablets and make necessary mark ups. I hope that clears something up. Cheers!

It's important to learn naviswork with revit for better coordination experience and perfection.