Since 2007, over four million students have used WileyPLUS in one of more than 234,000 class sections. WileyPLUS has proven to be a resilient application with provisions for recoverability, adaptability, andscalability. This translates to exceptional reliability and availability. For each semester since Fall 2005, WileyPLUS has a 99.5% or better availability. In addition to tracking percentage uptime, Wiley tracks consecutive days without outage – WileyPLUS has run as long as 206 days without unplanned interruption.