Ers mis Mawrth 2018, rhoddwyd cryn dipyn o sylw i ragweld nifer y bobl sy'n debyg o ddefnyddio gwasanaethau'r Adrannau Brys dros y gaeaf, yn ogystal â nifer y cleifion fydd angen eu derbyn i'r ysbyty fel achos brys.
Since March 2018, substantial focus has been put on forecasting the volumes of people likely to access Emergency Department services this winter, as well as the numbers of patients who will need to be admitted to a hospital bed as an emergency.