Ahmad A. Models of architectural solutions and computing methods for them analysis during reengineering of information systems for organisation management.

Quality improving of information system reengineering problem is considered in the paper. Quality improving is provided by extension for analysis the set of possible architectural transformations. The transformations are based on different architectural patterns and styles. Mathematical modeling is considered as instrument for system analysis. An information systems life cycle model is studied and reengineering role for modern information systems are established in the paper. Two kinds of models are investigated in the paper: static models for decrypting logical structure of information systems and dynamical models for studying behavioral characteristics of the systems.