Why is the application for approval of Australian immigrants fast and slow?

First of all, it has something to do with the current policy. When the policy is tightened and the quota is reduced, the things you have to wait for will become longer.

Then, every day, immigration officials have different styles. Some people are efficient, while others ink. In any case, they acted quickly and got paid as usual.

Next, the Australian Immigration Bureau will go on strike if nothing happens. No one went to work after the strike, and all the cases were there and no one handled them.

The main reason is actually the influence of the current policy.