As the availability of mission-critical applications becomes a requirement of modern business processes, the importance of high availability systems continues to grow. From the customer perspective, system availability depends on a bundle of underlying capabilities, including operations infrastructure and staff; change management and incident response processes; as well as application design and development. As part of a challenge to reduce application downtime by half, SunTrust is looking at a broad range of levers to increase availability and asked to speak with other IMF member organizations about their own approaches to the high availability challenge. The resulting conference call discussion focused on several aspects of the issue and gave participants an opportunity to compare experiences and exchange lessons learned.