The success of many global health investments hinge on the question of whether the people for whom a product or service is designed will take up the intervention. However, we often don't take this into account early enough in the process of designing an intervention. The result is that we start with a solution in mind before stopping to to think about whether we effectively understand how people are experiencing or engaging with a problem and/or the intended solution.
For a greater emphasis on what people really need and want, you can bring in a design partner who will help you re-examine your assumptions and champion a clearer focus on how to better understand your target population's behaviors, the needs and wants that are at the root of those behaviors, and what is at stake for people whose behaviors your solution is targeted at changing.