First, They do not eat or sleep and etc., they are available 24 hours/7 days a week is why their productivity far exceeds any limit of human capacity. Second, robotic welding generates particulate matter to each of them and reduces waste as well as the equivalent in the production cost saving. Along with this Overhead, the quality in finished products also increases, as the need for mistake correction drops out of it and putting more resources towards value-adding work that truly matters to customer businesses.