Alternative methods of collecting PPI data
More and more organizations are collecting PPI (and other) data via methods other than the traditional visit to a client at their home. We'd like to know - what have you tried, what challenges have you had, and what is working?
We tested collection of PPI via several different methods in India in this paper - http://www.progressoutofpoverty.org/theres-no-place-home-how-interview-m.... And Acumen, a PPI Alliance member, has done a good bit of this in their Lean Data initiative. Grameen Foundation India worked with Acumen to collect PPI data via a call center for Ziqitza - http://www.progressoutofpoverty.org/acumen-and-grameen-foundation-study-....
What other examples are there?