Which of the following is NOT one of the Lean 7 wastes?

In the context of Lean methodology, the concept of the 7 wastes is essential for identifying areas where efficiency can be improved. The recognized Lean 7 wastes include transportation, overprocessing, overproduction, waiting, inventory, motion, and defects.

Transportation refers to the unnecessary movement of products or materials, which can lead to increased costs and time. Overprocessing involves doing more work than necessary to complete a task, which can waste resources. Overproduction occurs when more products are made than needed, leading to excess inventory that ties up capital and space.

Customer service, however, does not fall under the Lean 7 wastes. Rather, it is typically viewed as an important aspect of business operations aimed at improving customer satisfaction and enhancing the overall experience. While inefficiencies can exist within customer service processes—such as long response times or unresolved issues—these would not be classified as one of the primary wastes identified in Lean methodology. Hence, customer service is the correct answer as it does not belong to the identified Lean 7 wastes.