The phrase comes from the AI value management layers, which put it as an operating principle: move the conversation from AI spend to AI value density.
The AI value calculator measures the cost-only form: a year's estimated value divided by a year's AI spend. A ratio of 3 means each pound of AI spend is estimated to return three pounds of value. The fuller idea also weighs risk, human effort and operational complexity, which a single ratio cannot capture, so treat the number as a starting point for comparing use cases, not a verdict on any one of them.