Question $7$:

Taiichi Ohno, the former chief engineer of Toyota in Japan, was influential in the development of what is now widely known as lean thinking: He suggested seven common 'wastes', or non$-$value$-$adding activities. The second one is the waste of waiting. Which one is NOT one of its waste symptoms:

$$ lack of motion $$ excessive lead times

$$ lumpy flow $$ opportunity cost of waiting time