They exist to enable us to purchase items efficiently and effectively and help ensure consistency of quality, certainty of supply and offer savings through economies of scale.
Maen nhw'n bodoli i'n galluogi i brynu eitemau'n effeithlon ac yn effeithiol ac i helpu i sicrhau cysondeb o ran ansawdd, sicrwydd o ran cyflenwad ac i arbed arian drwy arbedion maint.