Industrialized Construction Index (ICI): a project indicator for industrialization assessment.

Industrialized Construction represents a fundamental paradigm shift toward a product-based approach to address chronic productivity and quality issues in the sector. However, the lack of a standardized, scientifically rigorous metric to quantify industrialization maturity hinders strategic goal-setting and cross-project benchmarking. This paper presents and validates the Industrialized Construction Index (ICI), a quantitative framework measuring maturity across five pillars: Standardization, Prefabrication, Modularization, Automation, and Digitalization. Utilizing a multi-case study approach, the ICI was deployed across 61 residential projects in Colombia and 33 projects in France. Findings demonstrate the indicator's sensitivity to diverse market realities, revealing a 33% industrialization maturity in the Colombian market-driven primarily by design standardization, while French projects exhibited higher variability through advanced off-site solutions like volumetric modules and timber-frame facades. The research confirms the ICI as a robust, cross-border assessment tool that allows construction companies to move beyond subjective classifications toward verifiable metrics, facilitating the correlation between industrialization levels and global project performance.