Question: 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

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 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 110?3(one in a thousand) There are several ways that these components can be arranged, but only one that meets the customer's criteria.

This is a below-grade system (sump pump) designed to prevent flooding in a basement. Each of these components shown has a failure probability of one in a thousand (110?3)demands. How do you calculate the probability of this subsystem failing?

Power Source Float Alarm

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