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.
Inventory is not just about the items a retailer sells. Inventory management involves taking stock of a business' assets, such as labor, cash and material items used or sold. In essence, inventory control enables the business to have what it needs, when it needs it in order to do business.