Software product-line evaluation in the large

Abstract Software product-line engineering is arguably one of the most successful methods for establishing large portfolios software variants in an application domain. However, despite benefits, a product line requires substantial upfront investments into platform with proper architecture, new software-engineering processes (domain and engineering), business strategies commercially visions financial planning, as well re-organization development teams. Moreover, full-fledged not always possible or desired, thus organizations often adopt only to extent that deemed necessary was possible. understanding current state adoption, namely, maturity performance organization, challenging, while being crucial steer investments. To this end, several measurement have been proposed literature, prominent Family Evaluation Framework (FEF), introduced almost two decades ago. Unfortunately, applying it straightforward, benefits using assessed so far. We present experience report FEF nine medium- large-scale lines avionics discuss how we tailored executed FEF, together relevant adaptations extensions needed perform. Specifically, elicited data assessment 27 interviews over period 11 months. experiences assess aiming at helping other assessing their practices variants.