Defects, Inventory, Processing, Waiting, Motion, Transportation, and Overproduction. These 7 Wastes are common steps within any operation which add no value to the customer. These original 7 Wastes were described by Taiichi Ohno, and have since been added on to as Lean moves into industries that deal with more than physical production.
See also 8 Wastes, Waste, Elimination of Waste, and Non Value-Added