ABSTRACT
Managing a water supply system requires an active control of all instances involved. A manager should always have a general vision of the state of things in the company, so problems and solutions can be anticipated. This knowledge should reach all parts of the business, probably not too thoroughly, but deeply enough to detect anomalies when arising. Any modern business generates a great amount of information that cannot be totally processed by a single person. Reality is usually too large to be analysed by any manager, and yet decisions need to be made. The information systems present nowadays in water companies are capable of storing most of the information generated within the utility, in what formally can be described as Management information systems, devised to aid in the decision making process.
