Waste (or muda)
Waste is anything that does not add value to a product or service. Value is anything that brings benefit, as defined by the customer, to a product or service. The Japanese word for waste in Lean operations is muda. Taiichi Ohno described the seven classic types of waste in production operations as:
- Inventory
- Motion
- Waiting
- Over-processing
- Over-production (WIP)
- Defects
- Transportation
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