To substantially improve operational control of complex industrial plants, it is important to be able to predict the influences which process variables have on quality-relevant target variables. The determination of influencing relationship and also the delay-time behaviour of various industrial processes makes it difficult to sythesis a quality projection system. A hybrid modelling method combined with a suitable classification of process characteristics ensures a widespread model synthesis for quality projection. So a sythesis of plantwide quality prdiction system for an iron ore sintering plant could be realized.