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. Inventory: Stocks or items used to support production (raw materials and work-in-process items); supporting activities (maintenance, repair, and operating supplies (MRO); and customer service (finished goods and service parts).