Always return to the program logic. If the program logic and implementation plan include a variety of value chains, the evaluation must ensure sufficient power to track early and realistic impacts on income in each value chain. In El Salvador, the evaluation was not originally designed to be done by value chain but by all three sectors together. When unbundled, the design was “underpowered” to report on individual value chains, contributing to the uninformative evaluation of the horticulture value chain.
Lesson Learned