To easily collect the production achievement by judging that the work in a process is defective when the production achievement in the after process of this process can not be detected in a fixed time, and storing the quantity of the work achievement in the pre-process of this process as the defective quantity of production achievement in this process.

An intermediate file 53 for a lot is formed from the picking time and sticking time of the original plate picking achievement file 51 and reinforcing hardware sticking achievement file 52 of a memory device 5, and stored in the memory device 5. When no value is present in the sticking time, the picking time in the record of the intermediate file 53 is compared with the present time, and when it exceeds a preset time, production of a defective in a cutting process 72 is judged, and an original plate 6 in the cutting process 72 of the lot is processed as defective in a cutting achievement file 54.