Method for designing a field device station, such as a control valve, a pump or the like, for a process plant, such as a chemical plant, a food processing plant, a power plant or the like, wherein the process plant with the filed device station to be designed is mappable in a simulation environment on the basis of operation-specific plant characteristics of the process plant, such as type of the process medium, process fluid flow, number of field device stations, plant environment or the like, and wherein the method comprises the following steps: Providing a field device module for simulating at least a section of the field device station in the simulation environment, wherein the field device module is configured to simulate at least one field device from a group of field devices, by means of which field device at least one operating variable, such as a controlled variable, for example temperature, pressure, flow rate or the like, of the mapped process plant is influenceable; determining the field device module to at least one field device to be simulated from the group of field devices and to at least one associated field device-specific design parameter, such as a geometry parameter, a performance parameter, such as an actuator force, a pump performance, a KV value or the like, wherein the field device module realizes a digital image of the field device with a specific design range and wherein the simulation environment uses the field device-specific design parameter to determine the design range; simulating the operation of the mapped process plant and the field device station to be designed using the set field device module to determine for the at least one field device to be simulated at least one operating variable of the mapped process plant depending on the at least one associated field device-specific design parameter; and selecting a field device suitable for the field device station to be designed from the group of field devices based on a comparison of the at least one determined operating variable with an evaluation operating variable, characterized in that the field device module iteratively determines field devices to be simulated from the group of field devices and automatically selects the suitable field device based on the comparison of the determined operating variable of the mapped process plant based on an iteratively changed design range. Providing a field device module for simulating at least a section of the field device station in the simulation environment, wherein the field device module is configured to simulate at least one field device from a group of field devices, by means of which field device at least one operating variable, such as a controlled variable, for example temperature, pressure, flow rate or the like, of the mapped process plant is influenceable; determining the field device module to at least one field device to be simulated from the group of field devices and to at least one associated field device-specific design parameter, such as a geometry parameter, a performance parameter, such as an actuator force, a pump performance, a KV value or the like, wherein the field device module realizes a digital image of the field device with a specific design range and wherein the simulation environment uses the field device-specific design parameter to determine the design range; simulating the operation of the mapped process plant and the field device station to be designed using the set field device module to determine for the at least one field device to be simulated at least one operating variable of the mapped process plant depending on the at least one associated field device-specific design parameter; and selecting a field device suitable for the field device station to be designed from the group of field devices based on a comparison of the at least one determined operating variable with an evaluation operating variable, characterized in that the field device module iteratively determines field devices to be simulated from the group of field devices and automatically selects the suitable field device based on the comparison of the determined operating variable of the mapped process plant based on an iteratively changed design range.