Production system, production method, and control device

A production method for producing a product from a raw material by a production process having a plurality of steps, the method comprising:

• a step of operating a plurality of production apparatuses that handle the steps;
• and
• a step of causing a control device to determine a control target value set for each of the plurality of production apparatuses, wherein
• the step of causing the control device to make determination, upon obtaining information of a manufacturing condition indicating a state of at least any step among the plurality of steps, determines a control target value set for at least any of the plurality of production apparatuses by referring to information of a combination of groups specified in accordance with a superiority/inferiority, which is determined on the basis of a quality item of each of lots classified according to each of combinations of steps in a plurality of the groups which have been classified according to each of the manufacturing conditions in each of the steps, the superiority/inferiority being a superiority/inferiority of a route of manufacturing conditions that is followed when each of the lots passes through the production process.

A control device of a production system producing a product from a raw material by a production process having a plurality of steps, the device comprising:

• a processing unit that executes processing of determining a control target value set for each of a plurality of production apparatuses that handle the steps;
• and
• an output unit that outputs the control target value determined by the processing unit, wherein
• the processing unit, upon obtaining information of a manufacturing condition indicating a state of at least any step among the plurality of steps, determines a control target value set for at least any of the plurality of production apparatuses by referring to information of a combination of groups specified in accordance with a superiority/inferiority, which is determined on the basis of a quality item of each of lots classified according to each of combinations of steps in a plurality of the groups which have been classified according to each of the manufacturing conditions in each of the steps, the superiority/inferiority being a superiority/inferiority of a route of manufacturing conditions that is followed when each of the lots passes through the production process.