Which component of ITIL involves planning for the restoration of services after an unexpected outage...

Continuity management (or business continuity management) is focused on planning for the successful restoration of systems or services after an unexpected outage, incident, or disaster. Problem management is focused on identifying and mitigating known problems and deficiencies before they occur. Availability management is focused on making sure system resources, processes, personnel, and toolsets are properly allocated and secured to meet SLA requirements. Configuration management tracks and maintains detailed information about all IT components within an organization.