The Rules tab of the Clash Detection dialog is used to apply suppression rules to the clash detection operation. Each rule can be turned on or off for any given job.

If you find that the first run of clash detection produces a high number of clashes, you can set up suppression rules to exclude certain clashes. You can create suppression rules that specify certain conditions that are not to be considered as clashes. Then using these suppression rules, the Clash Detection dialog can skip the clashes to give you a more realistic result.

A copy of the rule is stored with each job, the delivered rules are stored in the workspace.