Constant changes in the market and increased competition make it necessary to dynamically adapt the way of running a business. The pressure of constant changes implies the emergence of requirements for information technology, which is the basic tool for information processing in organizations. The necessity of immediate reaction to business changes, reduction of time of business processes realization, immediate retrieval of information and its sharing, became the foundation of the idea of a company processing real-time information (Real Time Enterprise, RTE). RTE provides real-time information to employees, customers, suppliers, and other business partners, ensuring timeliness and consistency across all IT systems. The possibilities of RTE implementation thus become an important element of the IT operation and the entire enterprise. It seems to be advisable to find determinants of designing a proper IT system supporting the operation of an enterprise that processes information in real time (RTE).