The RTO (Recovery Time Objective) will be contingent on several factors, including: -
The amount of data to be restored : Do you have to restore a single file or an entire data store?
The number of restores to be performed : Do you have to store one full backup plus three incremental, or just one differential?
The type of backup media in use : Are you restoring from physical media or over the network? Newer tape media such as LTO-4 work with high-speed drives that greatly reduce the amount of time required to restore data.
The location of the backup files : Is the data on media physically located in an offsite storage location?
One method is to create an overall disaster management plan that addresses aspects of recovery after a disaster, with the following individual sub-plans: -
Systems : Covers handling of server faults and general restoration of data, applications and services
Network : Focuses on bringing up internetworking devices, such as routers and switches
Communications : Coordinates how different organizations are contacted, such as law enforcement, company management, hazardous materials personnel and Federal Emergency Management Agency (FEMA), if necessary.
These different parts of the plan can easily map to different teams in a larger organization.