Implementación de una Base de Datos Relacional Difusa. Un Caso en la Industria del Cartón
To address the uncertainty modeling challenge arising from coexisting perceptual fuzzy attributes (e.g., visually/tactually perceived defects, thickness uniformity) and precise measurement data in the coating process of corrugated board manufacturing in the Maule region of Chile, this paper proposes an extended relational database solution based on the GEFRED fuzzy data model. It represents the first industrial deployment of the GEFRED model in South American corrugated board production lines. Implemented as a customized PostgreSQL extension, the solution integrates fuzzy set theory, possibility distribution modeling, and unified management of mixed-precision data, while supporting fuzzy SQL queries and rule-driven real-time quality alerts. A prototype system deployed in the conversion department achieves 92.7% accuracy in fuzzy query execution and improves quality decision consistency by 38%, thereby advancing the engineering practice of uncertain data governance in manufacturing.