Dechreuwyd datblygu’r dangosyddion ym mis Rhagfyr 2014 gyda chomisiwn i Athrofa Polisi Cyhoeddus Cymru i roi eu cyngor ar y mater. Ym mis Hydref 2015, cyhoeddon ni set ddrafft o ddeugain o ddangosyddion cenedlaethol gan ofyn a fydden nhw’n ein helpu yn y pen draw i ddeall faint o gynnydd sydd wedi’i wneud i gyflawni’r saith nod llesiant. Penderfynon ni ar bedwar maen prawf sylfaenol fel sail wrth ddatblygu’r dangosyddion. Y meini prawf hynny oedd (i) cadw’r nifer yn fach a hylaw, (ii) sicrhau eu bod yn berthnasol i Gymru gyfan, (iii) eu bod yn ystyrlon ac yn ategu ei gilydd a (iv) bod y dangosyddion yn taro tant gyda’r cyhoedd.
The development of the indicators started in December 2014 with a commission to Public Policy Institute for Wales to advise on the development of the indicators. In October 2015 we published a draft set of 40 national indicators to gather views on whether these would help us understand, over time, what progress was being made in achieving the 7 well-being goals. We established 4 essential criteria to guide the development of the indicators. These were (i) keep the number short and manageable, (ii) make sure they are measures for the whole of Wales, (iii) they should be coherent and fit together, and (iv) the indicators must resonate with the public.