The HIV Service Delivery Case Study Project, between, 2013 – 2016, Pangaea, in partnership with the Clinton Health Access Initiative (CHAI), with funding from the Bill and Melinda Gates Foundation, developed and costed a series of single descriptive case studies documenting effective approaches to HIV service delivery in Sub-Saharan Africa. The goal of the project was to improve uptake of and retention in effective HIV service delivery to improve treatment and prevention outcomes. The documentation of successful approaches to increase demand for and sustained use of HIV testing, treatment, prevention and support services provided a resource for country level program managers, program implementers, advocates and donors to better determine how to scale up programs effectively and gain maximum benefit from resource investments. The case studies reflected intervention level reviews that described interventions that were particularly effective at addressing a component or multiple components of the continuum HIV prevention and treatment services.   The selection of programs for the case studies presented information and cost estimates about a diverse set of programs, that look at both community- and facility-based services, programs addressing urban and rural populations, key affected populations, and programs that are well integrated with other areas of health services including primary care, sexual, reproductive, and maternal health services. Through this process, Pangaea sought to improve uptake and scale of HIV services and fill the gaps in the HIV treatment cascade.