to ensure that the Welsh Government’s needs for information are met by the most appropriate and cost effective mechanism, whether that be by surveys or other existing data sources
sicrhau y caiff anghenion Llywodraeth Cymru am wybodaeth eu diwallu yn y modd mwyaf priodol a chosteffeithiol, p’un ai drwy arolygon neu drwy ffynonellau data eraill sydd eisoes mewn bodolaeth