Business continuity planning involves 4 phases: risk analysis, plan development, testing plans, and ongoing review. It aims to minimize downtime from disruptions through identifying critical functions, assessing risks, analyzing impacts, and creating strategies for prevention, preparation, response and recovery. Testing plans regularly is important to ensure readiness. Without a plan, disruptions can lead to losses, failures, reputational damage and other issues. Quantifying the costs of downtime is crucial for justifying continuity investments and maintaining plans.