This fact sheet provides an overview of the required and enhanced estimates and analyses for RWHAP unmet need estimates. The revised Unmet Need methodology has both required and enhanced estimates and analyses. Required estimates and analyses use HIV surveillance data, while enhanced estimates and analyses use both HIV surveillance and RWHAP data and may also utilize other data for care patterns. The required estimates and analyses are the minimum requirement for all recipients; HRSA HAB encourages all recipients to do enhanced analyses if possible.