Schedule management system

A schedule management system having a plurality of production facilities for producing products on the basis of a plurality of production processes and a main control device for managing the production process of each production facility and for managing a production schedule made of the production processes of all the production facilities, characterized in that

• the production process comprises a plurality of sub-processes, and in the sub-processes, production status is determined;
• the main control device is capable of updating a first production process by adding a new sub-process to the first production process or by deleting an existing sub-process of the first production process on the basis of a determination result from the sub-process configuring the first production process while the required first production process is being carried out in the production facility;
• and
• the main control device is further capable of updating the production schedule by updating a second production process different from the first production process on the basis of the update of the first production process.