An independent summative evaluation was commissioned in July 2021, which reviewed the impact of the first WHQS and made recommendations for the revised version.
Roedd yr ail ym mis Ionawr 2020 er mwyn ystyried a thrafod ei adolygiad o effeithiolrwydd ar gyfer y flwyddyn ac unrhyw gamau ar gyfer gwella a ddeuai yn sgil hynny.