Often I use the collision check functionality in Creo parametric, and every time I get a lot of warnings. That is because most screws interfere with their threaded holes partly, because they are mounted that way. This is quite usual. Of course, some work-arounds are possible: reduce the screw diameter etc... but this is not as close to reality as CAD should be in order to be useful, IMHO.
So this Idea is to propose the ability to 'mark' those collisions that are 'intended' by the desinger by some way so that they dont show up as a warning next time. But they should of course again appear as a warning when checking for collision if
* their volume has changed - now more or less than when it was marked as 'intended' ,
* the participating parts have changed (file name), or
* an option to display them all has been selected.
Like this one can concentrate more on the desing intention with less distractions and select those collisions that are 'accepted'. Now the collision check is even more useful because it displays more useful warnings and on can determine quite easily the impact of a design change for instance.