“…According to , although results from the naïve approach can be very competitive in the multivariate case, taking into account the order improves the performance. In the functional case, the few papers that deals with ordinal classification when inputs are functional data are based mainly on the use of the functional generalized linear model (Aguilera & Escabias 2008;Barahona, Centella, Gual-Arnau, Ibáñez, & Simó 2020), and in many cases the order is ignored . To the best of our knowledge, ordinal methods for functional data with the ordinal binary decomposition approach, the second approach, have not been considered until now, and the third approach has not been fully exploited either.…”