So has your office gone to one of those “open office” floor plans?  

According to the really smart people, there are a lot of advantages of  this kind of open office design. However, one of the downsides to it is  that it can be all too easy for someone to show up unannounced at your desk and interrupt the work that you are doing  no matter how good your manager skills are. We want them to go away and  just leave us alone to do our work. 

In this kind of open office, what  can a manager to in order to tell the world that we just want to be left  alone?