I see places with lock-ups. Most have other quarantine areas as well. Lock-ups rarely work (again, we look at discipline).
I remember some years ago I was working with Westinghouse in a military electronics group. They had a locked room - it was the 'MRB' (Material Review Board) room and it was locked. Came in one morning and there were some items missing! No window - only a door. Then we noticed a ceiling tile out of place a bit. Sure enough, someone had climbed into the ceiling on the other side and into the MRB room thru the ceiling.
Most of my clients have minimal segregation. In fact, one chemical client has absolutely no segregation. They rely on 'DO NOT USE' type tags. The bulk made it rediculous to segregate in a specific area. The registrar bought off on it.
Use your head. Don't go to extremes. Locks and doors are not barrier! If your folks aren't disciplined and they want it, they'll get into it no matter what you do unless you segregate at a completely different location across town. Or in the next town. Or across the state...
And maybe even then....
Red lines are fine. Make sure you define your system well in your procedure(s).
I apologise for not being able to support you by saying you need a locked cage area. I believe discipline (respect for systems integrity - no really does mean NO...) is more important and works as well if not better.
Marc
[This message has been edited by TheOtherMe (edited 21 July 1999).]