What should the IT service continuity process primarily support?

Focusing only on critical IT processes is too narrow a scope - ITSCM must cover whatever set of IT services the business continuity strategy requires, which may extend beyond what is internally classified as critical IT.

Supporting all services in the service portfolio is an overreach - ITSCM targets only those services required to meet business continuity objectives, not every service regardless of business impact.

ITIL defines ITSCM as a process that is subordinate to and in direct support of business continuity management (BCM). The ITSCM plan must be derived from the business continuity strategy so that IT service recovery timeframes and priorities directly enable the business to resume operations within agreed thresholds, making the business continuity strategy the primary driver of all ITSCM activities.

Limiting support to mission critical services only during peak business periods is incorrect because IT continuity planning must address recovery at any time a disaster or major disruption occurs, not just during peak periods.