Members have the option to close questions, which is fine. But when there's a difference of opinions about if a Q needs to be closed or not, the ones who want to keep it open have no other option than to post a comment requesting to keep it open. Then, when the Q is closed, those members will have to start voting to re-open the Q again.
This is not effective! Once a member has voted to close a Q, a new option should appear allowing members to vote to keep the Q open!
My suggestion is to close a Q when the amount of Close votes exceeds the number of Open votes by 5. Then, when the Q gets as many Open votes as Close votes, the Q will be re-opened again. This scheme would allow members to firmly close a Q simply by doing a huge pile-up on the Close vote. (But the number of Open votes can never exceed the number of Close votes!)
It should also allow members to change their vote from Close to Open or vice versa.
I did a search, didn't find a Q that could be a duplicate of this one, which I consider strange. Am I the first to think of this? Impossible! Please prove me wrong! ;-)