The below Flood Alarms Problem identifies a system for which the customer wants a sump system with high reliability. The customer specifies that the sump system is to have a failure rate of less than five failures in one million operations. As you will see, there are three components in our system: an alarm, an electrical supply, and a float. Each of these components has a failure rate of one in a thousand. There are several ways that these components can be arranged, but only one that meets the customer's criteria. You may want to utilize a FTA to help with the math