In this session we present recent work in Delta Modeling. Delta Modeling is an approach towards modeling variability in software product lines. We will present the Delta Modeling Workflow (DMW), a formal step-by-step guide towards building a software product line from scratch. An approach that enjoys several beneficial properties. For instance, it supports concurrent and isolated development, reduces code duplication and results in product lines that are unambiguous and complete.

Michiel Helvensteijn will present a theoretical foundation of DMW. After that, Peter Wong will present the Fredhopper Access Server (FAS), an industrial case study used to evaluate DMW in a concrete practical setting.