Traditionally operations groups look to improve the mean time between failures. While avoiding failures is obviously still important, lessons from cloud computing have taught us to expect failure and instead to focus on mean time to recovery. Continuous Delivery automation makes rolling out rapid fixes easier and we are also seeing a growth in monitoring techniques to spot failures quickly through a ‘production immune system’. Teams are also successfully using semantic monitoring and synthetic transactions to exercise production systems in non-destructive ways. This combined focus allows teams to move rapidly with higher confidence, it can also reduce the emphasis on expensive test-execution in pre-production environments and is particularly important in responding to the ever-growing list of security vulnerabilities that are being discovered.