For the purposes of this example, consider a purchase of a notebook computer.
Below are 8 options for this computer.
They differ in 3 basic benefits (weight, the length of the battery life, and the price).
Rank order these 8 options from 1-8 by assigning 8 to your most preferred option and 1 to your least preferred option (it is very important that you assign 8 to your most preferred option.)