Amlinellwyd y penderfyniad i sefydlu swyddogaeth weithredol genedlaethol ynCymru Iachachyn 2018, a chafodd ei ailgadarnhau yn y Rhaglen Lywodraethu. Mae’r penderfyniad yn seiliedig ar ganfyddiadau ac argymhellion Adolygiad Ansawdd y Sefydliad ar gyfer Cydweithrediad a Datblygiad Economaidd (OECD) a’r Adolygiad Seneddol o Ddyfodol Hirdymor Iechyd a Gofal Cymdeithasol. Galwodd y ddau adolygiad hyn am ‘graidd’ cryfach, gallu ychwanegol o ran trawsnewid, ac am symleiddio’r strwythurau presennol.
The decision to set up a national executive function was outlined inA Healthier Walesin 2018, and reconfirmed in the Programme for Government, and is based on the findings and recommendations of the OECD’s Quality Review and the Parliamentary Review of the Long-term Future of Health and Social Care. Both of these reviews called for a stronger centre, additional transformational capacity and streamlining of current structures.