If the management provides sufficient incentive for efficiency and results to their customers,
it would make the system a more complete MIS and so the MIS should support this culture
by providing such information which will aid the promotion of efficiency in the management
services and operational system. It is also necessary to study the keys to successful Executive
Information System (EIS) development and operation. Decision support systems would also
make the system a complete MIS as it constitutes a class of computer-based information
systems including knowledge-based systems that support decision-making activities. DSSs
serve the management level of the organization and help to take decisions, which may be
rapidly changing and not easily specified in advance