[IanDrake]

Let's say you have a room full of shit and your objective is to make the room smell nice.

You decide the best way to do that is to shovel the shit out of the room.

Efficiency is how fast you empty the room. Effectiveness is how nice the room smells when you're done.

[aadilmaan]

best analogy ever. What is more important to you?

[IanDrake]

Effectiveness. Being efficient is only helpful if you are effective.

If the room still smells like shit after all that shoveling, does it matter how fast you shoveled?

[aadilmaan]

Indeeeed!