Training a feedforward neural network leads to a model affected by unc
ertainty. A measure of this uncertainty gives an important indication
of neural model's quality and of its generalisation characteristics. I
n the present paper we propose an original procedure to give a quantit
ative description of the uncertainty that derives from the limited siz
e of the data set. The effectiveness of the proposed procedure is veri
fied by means of experiments. (C) 1998 Published by Elsevier Science B
.V. All rights reserved.