Abstract: A production line constructing system for constructing a production line having groups of processing apparatuses, articulated robots for loading workpieces on and unloading processed workpieces from the processing apparatuses, and an automatic conveyor in the form of a vehicle for carrying a respective articulated robot and for conveying the workpieces between the processing apparatuses. The dimensions of the articulated robot are determined taking into consideration the width of passages in a work area, the dimensions of the vehicle, restrictions on available power supply, and the conveying speed of the vehicle carrying the articulated robot relative to the conveying speed of the operator. The production line is constructed so that a maximum loading/unloading area on the processing apparatuses within which a workpiece is loaded on and unloaded from the processing apparatus is included in a range of movement of the end effector of the articulated robot which is limited in dimensions.