In 19 of these the factors were considered major, which means different management may reasonably be expected to have altered the outcome.
Yn 19 o’r achosion hyn ystyriwyd bod y ffactorau yn rhai mawr, sy’n golygu y byddai’n rhesymol i ddisgwyl y byddai rheolaeth wahanol wedi arwain at ganlyniad gwahanol.