Current approaches for documenting runtime variability in Software Product Lines (SPL) [1][2][3] and Business Driven-Development [4], proposes different model representations. Unfortunately, we have determined that the expressiveness level in BDD is not adequate, and that SPL solutions needs for adaptation to BDD context for describing under which circumstances a business evolves. In this panel, we present a model for representing runtime variability in BDD systems. The main contributions of this proposal are: (i) it presents the enough expressiveness level for representing runtime variability; and (ii) process engineers can represent and understand under which events a business evolves and how this evolution is managed, which is not present in current approaches. We call this approach Product Evolution Model (PEM).