Even in this stormy climate, Spirit Airlines relies on IT to help keep the company’s planes and passengers in the air, supporting everything from online apps, reservations, maintenance, ticket counters, baggage, and air traffic management. Downtime is unacceptable. Just one hour of its reservations systems being offline can cost the airline $500,000; as a 24/7 business, its applications and IT services need to be continuously available no matter what potential disruption may strike.