In an era of digital transformation, original equipment manufacturers (OEMs) are increasingly adopting servitization strategies to differentiate their offerings and unlock new revenue streams. This thesis explores the commercialization potential of diagnostic services in the context of ASML, a global leader in semiconductor lithography systems. The study examines how advanced diagnostics can transition from being internal cost-saving tools to externally valued service components by applying value-based pricing strategies. Combining literature insights, industry benchmarking, and a dedicated case study with empirical modeling, the thesis examines the gap between the internal value of diagnostics and their external monetization. It proposes a structured framework for measuring and monetizing customer value.