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.
1 1) Compiles and maintains records of quantity, type, and value of material, equipment, merchandise, or supplies stocked in establishment: Counts material, equipment, merchandise, or supplies in stock and posts totals to inventory records, manually or using computer.