The ASAP HIV/AIDS Costing Tool follows a sequence of steps to walk the user through various set-up, mapping and costing processes, with the end result being a fully developed and costed HIV/AIDs strategy. The level of detail to be included in the costing is entirely up to the user. For example, the costing can be limited to the major drugs, laboratory supplies and other key cost items, or it can be comprehensive. The model can also be used as a budgeting and financial monitoring tool, and supports the complete cycle of planning, budgeting, operations and evaluation. The ASAP HIV/AIDS Costing Model incorporates key features of existing costing models (including the concept of target groups and coverage levels from RMN and the functional classification from NASA) into an approach specifically designed for costing HIV/AIDS strategies.