If they see data which shows their service is lagging behind – or that they are in front of the pack – it can be a powerful incentive to make change happen, or to get even better.
Os ydyn nhw'n gweld data sy'n dangos bod eu gwasanaeth ar ei hôl hi – neu eu bod ar flaen y gad – gall fod yn gymhelliant pwerus i wneud i newid ddigwydd, neu i wella hyd yn oed yn fwy.