A hunter turned to his guide and said "This seems to be a dangerous cliff. Its a wonder that they don't put up a warning sign?" The guide turned and said "They had one up for 2 years but no one fell off so they took it down!"
This made me smile. How often does this happen at work? We register an issue like communcication - we believe that we address it in the short term and then forget about it. We are then blind to see how the problem remains. Think about this - great managers do not take the signs down. They leave them up by constantly speaking to people and listening to the warning signs from their teams. They don't wait for the disaster...think about what have you addressed in the past and have now let it drop off your radar screen? Go and get feedback, and never take that warning sign down.