More than 30 partners have contributed to the design of concepts to date, and 17 organizations are taking part in implementing the first set of activities under MERLIN. How might we test and provide evidence to demonstrate the value add of this new STIP model of development, given that the impacts of many such programs are only discernible over the long term?.What are the cutting edge approaches to measuring impact, understanding complex development challenges and solutions, and using evidence to drive smart decision-making and policy?.How might we foster increased development impact through improved and innovative tools for monitoring, evaluation, research, and learning?.THROUGH MERLIN, THE LAB AND ITS PARTNERS AIM TO ADDRESS THE FOLLOWING CHALLENGES: This is especially true for projects operating in highly complex environments, where the best approach to the development problem is not well recognized, and project managers must adapt the project design over the course of the project. While standard approaches to Monitoring and Evaluation (M&E) work well for many USAID projects, when specific outputs and outcomes are not as easily identifiable up front, and where change might happen in a non-linear manner, these standard tools can fall short. The MERLIN Program was announced on Maand is structured to allow USAID to work with partners to collaboratively identify, design, and test cutting-edge solutions to more effectively understand and measure the impacts of development programs. MERLIN is a radically different approach to program design for USAID and its partners that allows users to source, co-create, and co-design development solutions that innovate on traditional approaches to monitoring, evaluation, research and learning (MERL). Global Development Lab (the Lab) and in partnership with the Bureau for Policy, Planning and Learning (PPL), and the Bureau for Global Health. Monitoring, Evaluation, Research and Learning Innovations Program (MERLIN) is a USAID endeavor led by the U.S.