Information Requirements and Critical Assessment of Level(s) Integrated with Level of Information Need (LOIN)

The Architecture, Engineering, Construction, and Operation (AECO) sector needs to shift from linear to Circular Economy to address environmental challenges and promote sustainability. This study critically assesses the Level(s) framework through two-part methodology: (1) procedural analysis of Macro-Objective 2 ("resource efficient and circular material life cycle") and its indicators, and (2) a simplified numerical case-study. It integrates the Level of Information Need (LOIN) to define Information Requirements revealing gaps in automation and precision. Findings highlight the need for digital tools and standardized data flows to improve circularity assessments. The study provides actionable insights for refining Level(s) implementation and stakeholder collaboration.