One of the most critical concepts in Lean organizations is the idea that it is essential to eliminate waste. Why is it so central to the practice of Lean? The principles of Lean say that the ultimate goal is to provide perfect customer value. Anything that provides value to the customer is preserved. Everything else is considered waste. Some waste is inevitable due to physical constraints, regulations, or safety considerations. Still, most organizations find that they are engaged in many unnecessary activities and use more resources than is strictly required.
If you are striving to become a Lean organization, waste elimination is probably near the top of your list. Lean practitioners have identified particular types of waste, known collectively as the 8 Wastes of Lean. Certain types of waste are easy to spot and fix, while others are more difficult to detect. 

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