“I hope that clears it up for you, Mr. Icarus. Enjoy your flight, and thanks for flying Premium.” Mr. Icarus, whose desire to board the Premium plane has all but melted away during Glen’s long explanation, fades into the sea of people wading through the security lanes, without so much as a peep in reply. Develop a decision tree for Premium Airlines’ new policy for accumulating award miles so that the policy becomes clearer, is easier to grasp visually, and hence is easier to explain.

“I know you’ve got a plane to catch, but let me try to explain it once again to you, sir,” pleads Glen Curtiss, a marketing manager for Premium Airlines. Curtiss has been attempting (unsuccessfully) to explain the airline’s new policy for accumulating miles for awards (such as upgrades to first class and free flights) to a member of Premium’s “Flying for Prizes” club.