Visual predictive maintenance tool based on SOM projection techniques I. Díaz Blanco, A. A. Cuadrado Vega, A. Diez González, L. Rodríguez Loredo, F. Obeso Carrera and J. A. Rodríguez Rev. Met. Paris, 100 3 (2003) 307-315 Published online: 23 April 2003 DOI: 10.1051/metal:2003179