Sustainability, Vol. 7, Pages 13761-13776: Life Cycle Assessment of Process Eco-Innovations in an SME Automotive Supply Network (Sustainability)

The aim of the study presented in this article is to assess, from an environmental standpoint, a set of eco-innovations applied to the production process of an automotive component. The eco-innovations were developed by a supply network of small- and medium-sized enterprises (SMEs) in the framework of a project named `Hi-reach`. The component considered is a motorcycle rear wheel spindle. The conventional version is obtained by machining a single forged steel part. The Hi-reach version is indeed manufactured by joining a shaft to a flange; in addition, conventional surface treatments are replaced by a plasma-enhanced chemical vapour deposition (PECVD) treatment and other machining steps are improved. This process was conceived with the aim of maintaining (or enhancing) the technical performance of the spindle and reducing production costs. A Life Cycle Assessment (LCA) was carried out to compare the two scenarios described. Those eco-innovations resulted in significant improvements of the environmental performance of the analysed component, ranging, on average, between 50% and 70% for the impact indicators considered. Our results also highlight the role of SMEs in promoting process eco-innovations and the increasing relevance of LCA as a tool to support decision making in manufacturing.