This contribution describes a new, participative way of selecting CA-applications using simulation. This approach will be explained by the testing and selecting of shop floor monitoring and control systems (SMC-systems) by future users. Current practice confines potential users to a passive participation in decision finding and the evaluation of alternative systems is confined to system demonstrations or visil5 at reference users. In contrast, the proposed procedure ennbles test ing of SMC-systems by means of a simulation model provided with respective company specific data and environmental in formation. The simulation model portrays exactly the area which is to be controlled by the SMC-system and thus to allow for the verification of suitability of the SMC-system for any specific ta5k required. This contribution describes the set up for evaluation and first experiences with application in practice.