ABSTRACT
Computers are central to information systems. When most people hear information system, they think of computers. The degree to which information can contribute to a value-adding business process, and hence the value of that information, depends on its quality. Information is correct if it is derived from the proper data values through the proper processing steps. Consistency means that all data elements that contribute to an information item, or to a set of related items, are based on the same assumptions, definitions and time periods. Information is data that has been organized and processed to be meaningful to a person who will use it. Most incorrect input data is due to human error. An information system can reduce human data entry errors through source data automation, where data is entered automatically. Bar code readers are source data automation devices. A system can also use data validation to minimize incorrect data.
