Availability Planning, Recovery Design, and Business Continuity

This chapter explains how organizations keep critical systems available and recover when disruptions occur. The key ISC task is to connect technical resilience measures to operational risk, control objectives, and assurance implications.

In This Chapter

• Disaster Recovery Planning and Business Resiliency covers the basic planning structure for restoring operations after disruption.
• Redundancy and Replication Strategies (Mirroring, Backup Procedures) explains the mechanisms that support continuity.
• Business Impact Analysis (BIA): Identifying Critical Functions shows how organizations prioritize recovery around essential processes.
• Metrics and Agreements (Uptime, SLAs, Recovery Time Objectives) explains the benchmarks used to measure availability commitments.

How to Use This Chapter

• Read this chapter when availability questions seem operational rather than assurance-related.
• Focus on which continuity measure addresses which recovery or uptime risk.
• Revisit it whenever an ISC problem turns on resilience planning, not just security prevention.

In this section

• Disaster Recovery Planning and Business Resiliency Design
  Disaster recovery planning and broader business resiliency design.
• Redundancy, Replication, Mirroring, and Backup Strategy
  Redundancy, replication, mirroring, and backup strategy.
• Business Impact Analysis and the Identification of Critical Functions
  Business impact analysis and identification of critical functions.
• Uptime Metrics, SLAs, Recovery Time, and Recovery Point Targets
  Uptime metrics, SLAs, recovery time, and recovery point targets.