Those working in the food production. What do they do with the leftovers or the things that for example don't have the correct shape. they just throw it away or they put it back and reproduce it?

Special training in production is not required, is it?

Production sector has to do with the observation of the entire cycle of a product, from its elaboration to delivery, giving important data related to profits to the organization. Production managers work in this sector and they are responsible for planning and coordinating the manufacturing processes. Their job is closely related to the efficient production of goods.
A Production manager usually performs many of the following tasks:
• Ensuring cost effectiveness of a production.
• Calculating human resources and materials needed.
• Monitoring product standards.
• Connecting different departments.
• Creating reports about performance of subordinates.