Focus attention on items specified as most critical in the IT continuity plan to build in resilience and establish priorities in recovery situations. Avoid the distraction of recovering less-critical items and ensure response and recovery in line with prioritized business needs, while ensuring that costs are kept at an acceptable level and complying with regulatory and contractual requirements. Consider resilience, response and recovery requirements for different tiers, e.g., one to four hours, four to 24 hours, more than 24 hours and critical business operational periods.