During 2020 to 2021 we made changes to our systems which enabled us to measure our process from the time a refund request was received, giving us a fuller understanding of our performance.
Yn ystod 2020 hyd 2021 gwnaethom newidiadau i'n systemau sydd wedi ein galluogi i fesur ein proses o'r adeg y derbynnir y cais am ad-daliad, gan roi gwell dealltwriaeth i ni o'n perfformiad.