To do so, they need to know what is expected of them, have useful comparative data which shows them how they are doing and what good looks like.
I wneud hynny, mae angen iddyn nhw wybod beth sy'n ddisgwyliedig ganddynt, a chael data cymaradwy defnyddiol sy'n dangos iddyn nhw sut maen nhw'n gwneud a beth yw ystyr ‘da’.