Quality driven software migration of procedural code to object-oriented design

In the context of software maintenance, legacy software systems are continuously re-engineered in order to correct errors, provide new functionality, or port them into modern platforms. However, software re-engineering activities should not occur in a vacuum, and it is important to incorporate non-functional requirements as part of the re-engineering process. We present an incremental reengineering framework that allows for quality requirements to be modeled as soft-goals, and transformations to be applied selectively towards achieving specific quality requirements for the target system. To deal with large software systems, we decompose the system into a collection of smaller clusters. The reengineering framework can be applied incrementally to each of these clusters and results are assembled to produce the final system.