Wow, your plan to stop drive-by disruptions should have an amazing effect on your productivity. You may have found by now that you’re getting some resistance, but that is to be expected, even after explaining your new program well and pointing out the benefits to them. Of course it will be tested. You just need to stay firm on the need for meetings, and over time, they’ll get used to it. (They HAVE to get used to it–you’re the boss!) You just need to be strict with enforcement, no matter how loudly your need to meet other people’s needs shouts at you. 🙂