Production line management system, production line management method, can management system, can, manufacturing method for can

A production line management system for managing a manufacturing line for containers and/or a filling line for containers, the production line management system comprising:

• a first reading unit configured to read an identification code applied to each of the containers when each of the containers with the identification code indicating an identifier being information identifying each of the containers passes through a first point on the manufacturing line and/or the filling line;
• a second reading unit configured to read the identification code applied to each of the containers after the first reading unit reads the identification code;
• and
• a computing unit configured to
• generate a database in which the identifier indicated by the identification code and relevant information on each of the containers are associated,
• determine normality/abnormality of each of the containers by comparing the relevant information associated in the database with the identifier indicated by the identification code read by the second reading unit with setting information that is predetermined,
• the relevant information includes information for identifying a time of day when the first reading unit reads the identification code, and
• the setting information includes information regarding the time of day that sets a time period during which the containers should be manufactured and/or filled.