The college has a governance structure, one of the main purposes of which is to generate, discuss, and move along ideas for change. But ideas don't have to come only from committee members. Committees are supposed to be responsive to suggestions and proposals from wherever they may come. So--figure out the appropriate committee, talk to the chair, and see if your item can be put on the agenda. Depending on the nature of the proposal, approval at the committee level may then mean that the item is brought to the whole faculty for consideration and final approval.

But sometimes committees are unresponsive to agenda items from the outside. The agenda may already be very full, or the chair may not think the idea is worth bringing up. If the latter, you can ask a committee member to introduce the item; this may or may not be successful. But there is another possible route--bringing a proposal directly to the floor of the faculty. Any faculty member can put an item on the agenda by notifying the chair pro tem of the faculty. You don't want to do this lightly, because you risk annoying people if the item is generally viewed as insignificant or wacko. (If you've been working with other people all along, there's less risk of this.) What will almost always happen to an item introduced directly to the faculty is that there will be some discussion--enough to get a sense of opinion on the issue--and then a motion will be made to refer the item to the appropriate committee, usually with a date given by which the committee needs to report back.