Units that were developed and delivered to meet a clearly defined clinical role were more successful than those aimed at a more generic skilling of staff.
Roedd yr unedau a ddatblygwyd ac a gyflwynwyd i gwrdd â rôl glinigol a ddiffiniwyd yn glir yn fwy llwyddiannus na'r rhai a anelai at roi sgiliau mwy cyffredinol i staff.