Reengineering towards Product Lines

Software product lines often arise from a set of variants of a common code basis that have been individually adapted to a particular requirement variability. This ad-hoc and unplanned approach causes serious maintenance problems. Migrating such variants into an organized software product line promises better maintainability. In this talk, I shall outline our 3-year research program aiming at consolidating software variants into software product lines. We are tackling the problem both at the source code level and architectural level. We are adapting and extending techniques, such as clone detection, feature location, protocol recovery, and reflexion-based reconstruction that we have so far applied only to individual systems.