Many possibilities that occur in the production process that causes excess production, thus causing a serious abnormality. If not resolved properly, it will cause a further effect and shake the stability of the company.
In general, we can be sure of over-production because production management errors that are not controlled. Production Manager is the first person responsible for this abnormality, because those who regulate the production stability. However, knowledge about the “possible cause” of an abnormality in the production process must be owned by all employees, because it will make it easier where you wish to take action.