The UN Growing Inclusive Markets brings a strategic matrix for business trying to engage in BoP-projects or growing inclusive markets. The Matrix creates an overview of the most common constraints found in BoP-projects, and the most commonly used strategies to overcome these constraints. The matrix is of course rather general, but in this way it can provide an overview and a ‘map’ to navigate the field. However, you will need more specific methodologies also for how to actually engage in relations with local people, NGO’s, government, etc.
The report also has 50 examples of successful BoP-projects which you can read about in depth on the website also.