Information system must provide data, information and adequate information technology for: the running of the business process, management (subsystems and business functions etc.), expertise basics for management decision-making and, main business system management. In business systems three dimensions determine management, namely: executive body management, adaptation and development, which includes business processes as well. Therefore we can distinguish two basic business system application fields: a) information executive body subsystem, b) information subsystem development. Information subsystem development provides all the necessary data and information required for the adaptation projects carried out by managers and personnel as well as for the business system development. These projects are carried out on the business system and subsystem level. Information system project is an information system aimed at fulfilling information demands of the main system project, of the maintaining system project, as well as of the project system management. These projects are the result of strategies carried out within business systems. They are aimed at transforming strategies into projects, which are then carried out by business systems in a determined period of time. The quick transformation of strategies into projects together with the quick and higher quality performance, give rise to an advantage in business system competition.