risk management and contingency planning assumes that mitigation efforts have failed and that the risk has become a reality.
continuing the example, the project is well under way and a number of people announce that they will be leaving.in addition ,you can temporarily refocus resources (and readjust the project schedule)to those functions that are fully staffed enabling newcomers who must be added to the team to "getup to speed" those individuals who are leaving are asked to stop all work and spend their last weeks in"knowledge transfer modes".this might include video-based knowledge capture,the development of "commentary document of wikis" and/or meeting with other team member who will remain on the project.