For the IS/ICT project to be successful, dilligently performed analysis of not only functional, but also non-functional requirements for the systém, has to be done. This type of the bussiness requirements is thus primarily projected into the architecture of the whole information system. In the detailed analysis I primarily continue depending on the character of the project by proces hierarchy and porcess‘ threads modeling. All the time, I am takeing into account all the processes of the, which the final information systém will be to include and which will be either directly or indirectly affected by the IS. Only after that, I start the developmnet itself.