The theory of linear models is suggested for quantification of parameters'
significance in application to reflectivity data. Determination of the ulti
mate complexity of the model for real neutron reflectivity data by Ti/TiO2
film as well as influence of experimental limitations on the number of reli
ably restored parameters for Langmuir-Blodgett multilayer is considered. (C
) 2000 Published by Elsevier Science B.V. All rights reserved.