Use case 1: Stopped-meters

Problem definition: A stopped-meter is a meter that reports zero during a predefined period of time. The zero report can occur for two reasons: either the meter is faulty or else there is legitimate zero-consumption in the property. The usual solution is to send a technician after a predefined period of time, but the problem is how to determine the optimum period of time. If the period is too short, then in most cases, the technician will go for nothing. If the period is too long a customer may consume a lot of water without paying, so we have a situation of non revenue water for a long time.