1 Introducing Managed Software Evolution.- 2 The Nature of Software Evolution.- 3 Addressed Challenges.- 4 Introduction to Case Studies.- 5 Tacit Knowledge in Software Evolution.- 6 Continuous Design Decision Support.- 7 Model-based Round-Trip Engineering and Testing of Evolving Software Product Lines.- 8 Performance Analysis Strategies for Software Variants and Versions.- 9 Maintaining Security in Software Evolution.- 10 Learning from Evolution for Evolution.- 11 Formal Verication of Evolutionary Changes.- 12 Case Studies for the Community.- 13 Lessons Learned.- 14 Future Research.