Autolite copper core spark plugs use a copper-glass seal that bonds the insulator and terminal post center electrode together.
Overproduction or overstocking leads to increased inventory and money sitting idle. Inventory means any goods that are being held for any length of time, inside or outside the factory. In the Lean system, inventory is regarded as a symptom of a sick factory.
A company's merchandise inventory is an account that shows the total amount the company paid for products it has yet to sell to customers. Although a company reports this amount on its balance sheet, it also uses the amount to calculate its cost of goods sold on its income statement.