The effects of the configuration and operating conditions on the performance of the spouted bed tablet coating process have been, studied. The configuration parameters analyzed were the ratio between the draft tube diameter and the inlet orifice diameter, d(T)/d(i), and the conical base angle, gamma. To analyze the equipment performance the adhesion coefficient, eta, and the increase rate of the tablet mass, K-1, were measured as a function of the mass flow rate of the coating material, W-s, of the ratio between the mass feed flow rate of coating suspension relative to mass feed flow rate of the spouting gas, W-s(*)/K-g(*), of the air flow rate relative to minimum spouting, Q/Q(ms), and of the feed flow rate of atomising air, W-at. Procedures for the evaluation of the growth kinetics and for measuring the product uniformity are presented.