A 'completed' status in StudentConnect means that you have completed all necessary requirements of your course. To achieve a 'completed' status, you have been assessed by Student Central and confirmed as having completed all necessary course requirements.
A 'graduated' status in StudentConnect means that you have officially conferred your course award by the University (been granted your degree). You are 'graduated' on a specific date, which is your ceremony date, during a graduation round aligned with a Trimester period (e.g. T1 completers are aligned with the October graduation round each year). Once the 'graduated' status appears in StudentConnect, you are no longer considered a current Deakin student, you are now part of the Deakin Alumni Community.