1. Multi-level feature trees A pragmatic approach to managing highly complex product families Alberto Melendez Method Engineering Utrecht University April 10, 2013

2. Agenda About the authors Feature modeling background Multi-level feature trees Process Deliverable Diagram Example Questions

3. About the authors Dr. Mark-Oliver Reiser Technical University Berlin Reiser IT Consulting Compositional Variability Management Dr. Matthias Weber Technical University Berlin Project Manager at Daimler TSS

4. Feature modeling iPod Classic ControlScreenCase [1] SoftwareHardwareHeadphones [1] [0..1] [1] LEDRetina [1] Feature modeling paradigm Feature cardinality Feature model evolution Feature-Oriented Reuse Method (Kang et al.,1998) Conceptual Foundation for Feature Modeling (Asikainen, Männistö, Soinen, 2006) Cardinality Feature Modeling (Czarnecki & Kim, 2005) Cardinality Formalization (Czarnecki, Helsen & Eisenecker, 2005a) Staged Configuration (Czarnecki, Helsen & Eisenecker, 2005b) Variability management Managing complex variability (Reiser, 2008) Product line engineering (Pohl, Böckle & Linden, 2005)

5. The challenge Team NTeam CTeam TTeam P Team i or Product Line Manager How does a manager cope with the complexity of managing multiple products in a product line? Feature InnovationsFeature Reusevs Trade-off

6. The approach Creating a multi-level structure of reference models that product line managers can use to guide product evolution. Product Line Manager Product Designer Reference Models Referring Models Deviations Deviation Permissions Deviations

7. Multi-level feature trees Device CaseScreen RetinaLED MControl TDevice CaseScreen RetinaLED iPad CaseScreen Retina iPhone CaseScreen Retina 3G Deviation Permission s Allow Delete

8. Meta-Deliverable Model Apple Mobile Devices Device CaseScreen RetinaLED MControl [1][0..1] [1] Deviation Permissions Add Features Delete Features Edit Features Add Feature Groups Delete Feature Groups Edit Feature Groups Legal Illegal Product Line Management Configuration Management Feature Modeling Product Evolution Management

9. Process Deliverable Diagram

10. iPhone CaseScreen RetinaLED [1] Example TDevice: Feature models that represent Touch Devices. TDevice CaseScreen RetinaLED [1] TDevice Reference Model iPodTouch CaseScreen RetinaLED [1] TDevice Referring Model Add Feature: Yes Delete Screen: No Delete LED: Yes Delete Case: No Add Feature: Yes Delete Screen: No Delete LED: No Delete Case: No Compliant V1.0 iPhone CaseScreen Retina Phone [1] iPodTouch Referring Model iPodTouch Reference Model iPodTouch: Feature models that represent iPodTouch devices. Add Feature: Yes Delete Screen: No Delete LED: Yes Delete Case: No V2.0V2.1 Compliant iPhone CaseScreen Retina Phone [1]

11. Questions?