It is vitally important that the organization takes the development and maintenance of the disaster recovery plan seriously. It is not a task that can be left until everyone has time to deal with it. A serious incident coulc affect the organization at any time and this includes the next 24 hours... indeed, the next hour!
The plan needs to be developed by a team representing all functional areas of the organization. If the organization is large enough, a formal project should be established, which must have approval and support from the very top of the enterprise.
The first step on the path to assurance is taking that first step. Failing to take it, or taking it in a half hearted manner, could have dire consequences.