Missing component at the "base of the pyramid"

The Four A's framework for Strategic Innovation presented in "Strategic Innovation at the Base of the Pyramid"  thoughtfully acknowledges the complexities associated with innovation integration in developing markets. Delivering an affordable product to serve even the poorest of consumers, ensuring acceptability to tailor to specific needs,  prioritizing availability so that even the most isolated communities (considering that they could be the ones most in need of the innovation) can acquire it, and raising awareness through alternative communication methods -- is undoubtedly a bottom of the pyramid approach. But I think the pyramid is missing a component that pertains to both replicability and sustainability.

A friend sent me the embedded video link on Isang Litrong Liwanag "A Liter of Light," a replicable and sustainable project designed by students at MIT. The project empowers community members to build their own solar bottle bulb that provides a good source of daylight at 55 watts: http://isanglitrongliwanag.org/

The video tells the success story of the project in Sitio Maligaya, a poor village in the Philippines where some inhabitants would just sleep due to lack of light. Nicknamed "Solar Demi," one villager took the initiative to brighten up the dark homes by utilizing local resources to construct the bulb. He has pointed the community building bulb initiative to install 643 bottles. Furthermore what strikes me is the care of scarce natural resources even though this may be a fresh new concept to the community members -- bleach is added to the water in the bottles so that algae does not accumulate and light is not detracted.

Strategic Innovation should include the "Ability" concept, that includes potential for sustainability and replicability to empower the people or communities that they impact.

http://www.youtube.com/watch?v=JOl4vwhwkW8&feature=player_embedded