The SDG Accelerator and Bottleneck Assessment (ABA) tool aims to support countries to identify catalytic policy and/or programme areas or ‘accelerators’ that can trigger positive multiplier effects across the SDGs, and solutions to bottlenecks that impede the optimal performance of interventions that enable the identified accelerators. The ABA builds on the methodology of the UN MDG Acceleration Framework and its application in 60 countries, and is also informed by the COMBOS methodology developed by UNDP’s Regional Bureau for Latin America and the Caribbean, which has been applied extensively to countries in the region.