Economies of Flow Are Commonly Used to Design Services Versus

Economies of flow are commonly used to design services versus products. What is "failure demand" in economies of flow?

A) The point at which a process must be redesigned because it no longer meets demand levels.
B) A failure to do something for a customer or a failure to do something correctly.
C) The point at which demand can no longer be met.
D) The point at which flow meets resistance because of a failure.