In Autodesk Navisworks, the process of setting up and running a clash test is as follows: 
- Select a previously run clash test, or start a new test by using the Add Test   button at the top of the Clash Detective window. button at the top of the Clash Detective window.
- Set the rules for the test. 
-  Select the required items to be included in the test, and set the test type options. 
- Review the results and assign issues to responsible parties. 
- Produce a report of the identified issues and circulate for review and resolution.