They all involved the unions in their work; they committed resource to the process; they initiated departmental-wide reviews of NGHA usage and they communicated their plans clearly to managers.
Adolygodd y sefydliad ei ddefnydd o drefniadau oriau heb eu gwarantu o dan arweiniad y cyfarwyddwr, a chafodd yr undebau llafur eu cynnwys yn llawn yn y broses.