The first principle of agile software development states, "Our highest priority is to satisfy the customer through early and continuous delivery of valuable software." Since 2001 when that principle was first established, its meaning has been revised by some in the agile community to mean that projects should deliver business value. That's a laudable goal, and one I personally believe in. Furthermore, I believe that the success of a project should be based on business value delivered. But in order to gauge success, you have to be able to quantify the measure.