“Lean Thinking is a process whereby you understand exactly what it is you do, and eliminate any wasteful activities doing it while enhancing all value-added activities.”

“A wasteful activity is the opposite of a value-added activity, a term that defines any work and process that directly adds customer value to a product. A wasteful activity is not required in reaching your objective, while a value-added activity is.”

Dinero, Donald. Training Within Industry: The Foundation of Lean (p. 49). Taylor & Francis. Kindle Edition.