Reliability for systems means that they are doing what their users need them to do. A system's reliability is essentially how happy users are and we know those happy users are good for business. If reliability is one of the most important requirements of any system, users determine what reliability means, and it’s okay to not be perfect all the time. We need a way of thinking that can address this way of thinking since we have limited resources to spend, be they financial, human, or political.