Signal Interpretation in Hotelling's T2 Control Chart for Compositional Data

This work has been partially financed by the Ministerio de Ciencia e Innovaci´on (Ref: MTM2012- 33236) and the Ag`encia de Gesti´o d’Ajuts Universitaris i de Recerca (AGAUR), Generalitat de Catalunya (Ref: 2014SGR551)