This document provides essential reference information about the ESY platform, which is being developed in the EcoShipYard project to facilitate the integration of sustainability assessment tools, along with a set of key applications and relevant data sources, to form an open system that will enable accurate assessment of the non-operational stages of a ship’s life cycle. The platform shall enable users to utilize various software applications and services to establish a facilities model of a shipyard to carry out monitoring and optimization of the sustainability performance of a target production environment.