Production line configuration change system and production line configuration change method

A production line configuration change system comprising:

• an error information storage unit that stores information of an error which occurs in equipment on a production line;
• a work information storage unit that stores work contents required for manufacturing a product;
• an equipment information storage unit that stores constraint information of a tool mountable on the equipment;
• a production line configuration information storage unit that, in order of manufacturing processes of the product, stores a work content, work assignment equipment, a tool mounted on the equipment, and a process tact time in each of the manufacturing processes;
• an identical equipment constraint storage unit that stores constraints of a plurality of pieces of work information to be assigned to the identical equipment;
• and
• a processor configured to:
• prepare a change plan of assigning a work assigned to the equipment in which the error occurs to the equipment of a process before or after a process in which the error occurs or another equipment of the identical process, for production line configuration information stored in the production line configuration information storage unit, by using the equipment and the tool included in the production line, and calculates a provisional production line configuration;
• and
• calculate the provisional production line configuration so as to satisfy constraint information stored in the equipment information storage unit and constraint information stored in the identical equipment constraint storage unit,
• wherein the constraint information stored in the equipment information storage unit and the constraint information stored in the identical equipment constraint storage unit include the maximum number per classification of the tool mountable on the equipment, a work group which needs to be assigned to the identical equipment, and a constraint that a total number of tools of the production line configuration after the change is to be equal to or smaller than a total number of tools included in the production line immediately after the error occurs.

A production line configuration change method of changing a production line configuration by a calculator, the method comprising:

• in a case where an error occurs in equipment constituting a production line and the equipment stops, preparing a change plan of assigning a work assigned to the equipment in which the error occurs to the equipment before or after a process or another equipment of the identical process, for production line configuration information before the error occurs, by using the equipment and a tool included in the production line and calculating a provisional production line configuration;
• when calculating the provisional production line configuration, calculating only the provisional production line configuration satisfying the maximum number per classification of the tool mountable on the equipment, a work group which needs to be assigned to the identical equipment, and a constraint that a total number of tools of the production line configuration after the change is equal to or smaller than the total number of tools included in the production line immediately after the error occurs;
• among the provisional production line configurations calculated by a plurality of change plans, performing determination of adopting the provisional production line configuration of anticipating the largest production quantity during an operation time obtained by subtracting a set-up time required for instrument replacement from an estimated recovery time until an estimated recovery timing of the equipment in which the error occurs;
• and
• changing an operation program of the work of the equipment on the production line according to the determined provisional production line configuration.