After an initial scoping stage it was decided to concentrate on 2017-2018 senior pay data, as this was the year for which most public bodies had published data.
Hyd at bandemig COVID-19, mae gwybodaeth gyd-destunol yn dangos bod canolrif yr amseroedd aros ar gyfer profion diagnostig yn weddol sefydlog ers 2017 ac ar gyfer gwasanaethau therapi ers 2018.