software architecture

Maintaining an existing system is an important stage of the software system lifecycle. Over time the software gets older, the technologies used become outdated, maintenance problems and costs grow and business processes change. Then, reengineering is on the agenda. Reengineering will boost a software system’s longevity and help avoid new development costs.

The project required complete software reengineering, including creating new system architecture, data restructuring, using contemporary technologies. As a result, the new platform was successfully built, some business processes were enhanced. We succeeded in boosting performance, improving scalability and fault tolerance.

System reengineering is the process of improving existing software (refactoring) or creating new software with the same functionality, changing the system architecture and/or the data structure, adding functionality and updating stack of deprecated technologies. We discuss strategies that can be used when reengineering a software system.

Here, I write about multi-tier architecture as the best option for enterprise software products. I look at software architectures with different numbers of tiers and describe the best technologies for each layer.