To ensure investigation is proportionate to the level of risk involved with the accident / incident, the following has been agreed as a consistent standard of investigation across the authority.
Er mwyn sicrhau bod yr ymchwiliad yn gymesur â lefel y risg sydd ynghlwm wrth y damwain/digwyddiad, cytunwyd i ddefnyddio'r canlynol fel safon gyson ar gyfer ymchwiliadau ar draws yr awdurdod.