Disaster Recovery Plans Need Progressive Testing to Validate Recovery Readiness

Summary

Untested disaster recovery plans may fail in exams and operations. The article compares plan reviews, walkthroughs, tabletop exercises, execution tests, parallel runs and full interruption tests, emphasizing increasing assurance, cost and operational risk.

Key points

• Plan reviews check whether the disaster recovery plan is complete and up to date, with little cost or operational impact.
• Walkthroughs and tabletop exercises let teams review procedures and practice decisions without executing recovery systems.
• Execution tests use real tools and systems to carry out recovery procedures in a controlled scenario.
• Parallel runs test recovery systems at an alternate site while production remains active.
• Full interruption tests switch operations to the recovery environment, providing the strongest validation but carrying the greatest cost and operational risk.
• The article recommends progressing through each testing level in sequence, from review to simulation, execution and full interruption.