Abstract: A control system 10 of a production line, containing a processing unit 20 from which a workpiece 101 processed is obtained, wherein the control system 10 has: the processing unit 20; and a control unit 11 for controlling the processing unit 20, wherein the processing unit 20 has a plurality of unitary units 30, wherein each of the plurality of unitary units 30 has a unitary unit identification code 1 to 8, wherein the control system 10 of a production line has an inspection section 40 for inspecting the workpiece 101 processed, wherein the inspection section 40 can communicate inside the control system 10 of a production line, and wherein the inspection section 40 has an evaluation section 50 in which state of the processed workpiece 101 is evaluated to obtain evaluation results; a data processing section 60 in which the evaluation results are associated with the unitary unit identification codes 1 to 8 of the processing unit 20 in which the evaluated workpiece 101 is processed; a storage section 71 i

Abstract: A method of producing a product 90 through a plurality of production steps, containing: a step of acquiring equipment data D3 of production equipment 40 for producing the product; a step of acquiring product data D1 from the product 90; a step of storing the equipment data D3 and the product data D1 in a data collection unit 70; a step of associating the equipment data D3 with the product data D1; a step of judging abnormality of the product data D1; a step responsive to abnormality occurring in the product 90 for identifying one or both of equipment abnormality data D3n and product abnormality data D1n associated with the product judged to be abnormal; and the step of identifying the production step causing the product abnormality by the step of identifying the abnormality data.