Production line

A production line comprising:

• a conveyor that conveys a plurality of pallets along a predetermined route while the pallets are placed on the conveyor, a bracket being mounted on each of the plurality of pallets;
• a workpiece setting section, provided at a part of the route, where a workpiece is set with respect to the bracket on the pallet manually or automatically;
• a setting-position measuring section provided at a part of the route and that measures a position error of the workpiece in horizontal and vertical directions while the pallet is placed on the conveyer, the position error including a mounting error of the bracket relevant to the pallet and corresponding to a deviation from a proper position of the workpiece relevant to the pallet;
• a production process performing section provided at a part of the route and that performs a plurality of production processes on the workpiece on the pallet while the pallet is placed on the conveyer;
• and
• a workpiece extracting section, provided at a part of the route, where the workpiece, on which each of the production processes is performed, is extracted from each of the pallets manually or automatically,
• wherein at least two of the production processes for the workpiece on the pallet in the production process performing section are performed while taking into account the position error relevant to the pallet which is measured by the setting-position measuring section and without measuring again the position error relevant to the pallet.