a survey of us cement customers found that the reliability and continuous operation of the plant are their highest priorities coito et al shutting down a plant to install new equipment can jeopardize the integrity of the kilns a study of the swedish pulp and paper sector found the same thing thollander and ottoson figure a majority of energyintensive firms surveyed by unido regularly monitored energy use at both the plant and the individual process levels and both managers and engineers considered themselves well informed about energyefficiency opportunities unido h