Migration to multitier application architecture: a case study

During the migration of an application to a new system, it is usually desirable to start using new tools while keeping existing models. However, challenges brought by new technologies often lead to modifications in architecture of the existing system. Two similar applications with different architecture not sharing the same code base present a possible point of improvement. Development of a new multitier application based on open standards was an attempt to solve problems brought by old architecture. Special attention was given to implementation of specific feature of existing applications. A quality solution was achieved using stable platform and design patterns. Computerization of an administrative system of higher education in the Republic of Croatia is the project discussed.