A great read - Disaster recovery testing at Google: “In the same scenario, we tested the use of a documented emergency communications plan. The first DiRT exercise revealed that exactly one person was able to find the plan and show up on the correct phone bridge at the time of the exercise. During the following drill, more than 100 people were able to find it. This is when we learned the bridge wouldn’t hold more than 40 callers.”
http://queue.acm.org/detail.cfm?id=2371516