System for determining process parameters for the spray application of viscous fluids, comprising • an application system (86, 104), which can be actuated by predefining input parameters (92, 108), for a viscous fluid having at least the components of metering device, fluid valve and application nozzle (14, 44), • wherein the dynamic behaviour of the application system (86, 104) is dependent, with respect to the volume flow profile of the viscous fluid during the application, also on, inter alia, predefinable control process parameters, • an impacted object (20, 48) to be sprayed with the viscous fluid by the application system (86, 104), • a balance for continuously determining the weight of the impacted object (20, 48), including the viscous fluid applied thereto, wherein the balance is provided to make available a weight profile in the form of continuous measurement data, • at least one computing device which is provided • for actuating the application system (86, 104) with a sequence of changed input parameters (92, 108), • for determining from the weight profile a volume flow profile, correlating chronologically with the respective change in the input parameters (92, 108), of the applied fluid, • for determining and making available, on the basis of the input parameters (92, 108), the determined volume flow profile as well as at least one predefined dynamic volume flow profile, process parameters, optimized in terms of control with respect to at least one predefinable optimization variable, for the application system (86, 104), characterized in that the impacted object (20, 48) is a vertically oriented plate. • an application system (86, 104), which can be actuated by predefining input parameters (92, 108), for a viscous fluid having at least the components of metering device, fluid valve and application nozzle (14, 44), • wherein the dynamic behaviour of the application system (86, 104) is dependent, with respect to the volume flow profile of the viscous fluid during the application, also on, inter alia, predefinable control process parameters, • an impacted object (20, 48) to be sprayed with the viscous fluid by the application system (86, 104), • a balance for continuously determining the weight of the impacted object (20, 48), including the viscous fluid applied thereto, wherein the balance is provided to make available a weight profile in the form of continuous measurement data, • at least one computing device which is provided • for actuating the application system (86, 104) with a sequence of changed input parameters (92, 108), • for determining from the weight profile a volume flow profile, correlating chronologically with the respective change in the input parameters (92, 108), of the applied fluid, • for determining and making available, on the basis of the input parameters (92, 108), the determined volume flow profile as well as at least one predefined dynamic volume flow profile, process parameters, optimized in terms of control with respect to at least one predefinable optimization variable, for the application system (86, 104), • for actuating the application system (86, 104) with a sequence of changed input parameters (92, 108), • for determining from the weight profile a volume flow profile, correlating chronologically with the respective change in the input parameters (92, 108), of the applied fluid, • for determining and making available, on the basis of the input parameters (92, 108), the determined volume flow profile as well as at least one predefined dynamic volume flow profile, process parameters, optimized in terms of control with respect to at least one predefinable optimization variable, for the application system (86, 104),