Systems Thinking.

Removing a single olive from passenger's meals saved American Airlines $40,000 in fuel a year.  - Rob Crandall

Someone at American Airlines had to be thinking about saving money.

Someone had to be tracking olive purchases and handling costs.

Someone had to be tracking olives left on the plates of first class passengers.

Someone had to be tracking the effects on customer satisfaction of removing olives - and how many.

Someone had to have oversight over all this tracking and thinking to join the dots.

Someone had to make the decision on whether to remove the olive.

Someone had to track the consequences of the decision - e.g. customer complaints, cabin crew feedback, logistics chain.