0

2

4

6

8

10

12

14

Jun-08 Sep-08 Dec-08 Mar-09 Jul-09 Oct-09 Jan-10 May-10 Aug-10 Nov-10 Feb-11

Cu

mu

lati

ve I

mp

rovem

en

ts

Tail Metric

Introduction of Tail Measurement

• Raise your left hand if you think A Wins

• Raise your right hand if you think B Wins

• Don’t raise your hand if they are the about the same

In the same amount of space we can put either 4 As, or 3 Bs