Broadly defined, a Customer is any person (or group of persons) that receives products or services.

In the context of Lean Six Sigma, a Customer refers to anyone who receives the output (information, goods, services, etc.) of a process. Therefore, depending on the process, a Customer can include persons both internal and external to the organization or business.

For a better understanding of the Customer and an overview of Lean Six Sigma, check out our Free Lean Six Sigma Yellow Belt Training, Green Belt Training or Lean Training.

Elisabeth Swan

Elisabeth is a Managing Partner & Executive Advisor at For over 25 years, she's helped leading organizations like Amazon, Charles Schwab and Starwood Hotels & Resorts build problem-solving muscles with Lean Six Sigma to achieve their goals.