The Sendzimir mill is a rolling mill with cluster rolls for cold rolling such hard materials as stainless steel. Work rolls of small diameter are used to apply a strong rolling force to hard materials, but this makes it difficult to ensure the desired surface flatness. To solve this problem, a cluster roll configuration and various profile control units are adopted in the Sendzimir mill, which, as illustrated in the figure, is equipped with the upper first and lower first intermediate rolls which are tapered in one direction and are capable of being shifted. In addition, six separate rolls are installed at the top and bottom, together with two AS-U rolls. The AS-U rolls are each supported by seven saddles which can adjust the rolling load on each segment of the rolls. The AS-U rolls can be displaced along their axes to a different extent by the hydraulically driven saddles, resulting in a change in the profile of the rolled material in these axial directions. However, such a complicated roll structure and the large number of operating factors result in a non-linear relationship between the operating factors and the profile of the rolled material, causing difficulty in quantification. For this reason, applications of classical or modern control theories are not sufficient to produce the desired effects. In the past, skilled workers visually determined the profile of the strip at the delivery side and operated the mills utilizing their experience and intuition. The next section gives an example of how satisfactory results can be obtained by applying the new control techniques of a neural network and fuzzy logic as part of a new control system.