Let efficiency in this case mean the average time for an agent to reach the destination.

For consumers, this increased efficiency has meant lower costs for food.

But, as far as I can make out, "efficiency" means that we ought to discover everything about a machine except what it is for.

Such efficiency means a small reactor can pack a big punch.

"Sometimes, efficiency will mean doing these things regionally rather than locally."

The efficiency of the lights means that relatively small solar panels are needed, reducing the capital cost.

Productive efficiency simply means that society is making as much as it can.

"He's going to have a lesson in what efficiency really means."

But tidy efficiency didn't mean evincing much interest in the proceedings.

What does "productivity" or "efficiency" mean in a society that places a high value on psychic fulfillment?