@marcatordido hi DG or direct grant means when you lodged your visa application hindi ka na maka experience ng CO (case officer) contact kasi ang 1st and one only communication na ma receive mo is the Grant letter - madami nakaka reveive ng DG dito all of them uploaded all the required docs during visa application lodgement. But of course medical exam is one major factor too basta clear na medicals ang frontloaded mo lahat n docs mo upon visa application - mataas chance ng DG
But this is not a guarantee, marami din cases na frontloaded mo na lahat then CO will contact you to upload certain document kahit na upload mo na - meron times na na overlook ni CO ang ibang document.
Sa SG COC lagay mo lang migrating in Australia yan lang nilagay namin.
Godbless!