There are two things, and maybe Katleen can add to it. This is one of the 150 organizations that use the index, although they've added some of their own survey questions.
Basically it's a scientific way, based on the progress out of poverty index, of using the intelligence you get out of the national census survey to calibrate a special 10-question survey to correlate a family with where they are on the poverty spectrum.
There are two real reasons for using it, and why these more than 100 organizations do. Number one is that it lets the management of a microfinance group, and also the investors and donors, know if they are being successful. Second, it makes people in the organization aware of whether borrowers are not only repaying their loans but making progress toward and above the poverty line.
It makes it very simple to do that, especially if you put that information into a database and you know how to analyze it. Also, it's about getting business intelligence so you can continue to kind of tweak your products, because the poor are not a monolith; they all don't need the same sorts of products, and they don't respond as well to financial products as rich people.
It allows you to do some pilot testing and market research about what's really going to be a financially successful project and also provides information from a poverty reduction perspective.
Katleen, did you want to add to that?