OSCaR’s primary objective was to provide European opera houses with practical and scientifically supported information about the environmental impact of opera sets. This knowledge aims to guide opera houses in decision-making processes during the design and construction phases, so that their choices better benefit the environment. Furthermore, this initiative did not only focus on technical aspects and manufacturing processes but also on the role of production management in enhancing the environmental sustainability of opera sets. As its second objective, the project aimed to bridge the gap between production management and design methodologies, seeking to determine how these methodologies could facilitate the integration of environmental sustainability into production management practices at opera houses.