Planning and Development Processes for the Information System Based on the Command Query Responsibility Segregation Design Pattern

The development of a complex information system requires planning and the definition of all business requirements. Business requirements can change over time. Agile methodology enables development teams to adapt to real-time changes and the development of major features according to customer requests. One such complex information system is a platform for the electronic operations of state administration bodies. It contains multiple modules based on the Command Query Responsibility Segregation design pattern. A Croatian software development company created it for the Croatian state administration bodies. This paper describes the development process of creating this information system and explains the maintenance process.