The life cycle of an idea includes the concept that one will be phased out eventually if there is no activity and no action is taken (idea cleanup). For example, we plan to manually phase out ideas after 6 months to a year if they are not implemented and no activity (no additional votes/comments, etc.) have taken place during that time frame.
It would be very helpful to either...
a.) Add a time of last activity to an idea for quick reference (i.e. - Last Activity: 6 months and 2 days ago). - OR -
b.) Build some sort of automatic phase out rules. In our use case, we plan on moving ideas that haven't been commented on in the last 6 months or so to an Idle category and then after that they will go to a "Last Chance" category. At the end of this cycle if there is no activity to make them active again they will be closed. All of this is manual and will probably require a fair amount of effort. If this process of phasing out ideas could be automated it could be a big time saver.
Notes: Moderator comments should not impact the time of last activity since you wouldn't want it to reset every time a moderator changed a category or added a moderator comment, etc.