Roedd y tîm adolygu, a oedd yn cynnwys uwch weithwyr iechyd proffesiynol, nyrsys, a fferyllwyr, wedi ymweld â chyfanswm o 70 o wardiau mewn 20 ysbyty cyffredinol dosbarth yn ystod cyfnod o saith wythnos rhwng 15 Mehefin a 30 Gorffennaf. Cafodd yr ymweliadau eu cynnal rhwng 6am a hanner nos, yn ystod yr wythnos ac ar benwythnosau. Roedd pob un ymweliad yn ddirybudd.
The review team of senior health professionals, nurses and pharmacists visited 70 wards across 20 district general hospitals during a seven-week period between June 15 and July 30. The visits took place between 6am and midnight, on weekdays and at weekends. All the visits were unannounced.