From the DIBP facebook site:
When a valid application is commenced, an applicant is sent an acknowledgment letter at the very beginning. This acknowledgement contains contact information for the office where the application is being processed.
We aim to process 75 percent of applications within the service standards listed on our webpage
Keep in mind, an individual’s processing time is dependent on a number of factors, such as, but not limited to:
whether you have provided all necessary supporting documents when you lodge your application.
how well and how promptly you respond to any requests for additional information.
how long it takes to complete any required checks on information you have provided to support your application.
how long it takes to receive additional information required from areas outside the department, particularly in relation to health character and national security.
how many places are available in the migration programme.
This is why some applications can be decided faster than others and why we sometimes take longer than the service standards listed.
If you received the acknowledgment letter when you submitted your application, you can continue to wait and you will be contacted as soon as a decision can be made.
If you did not received the acknowledgement letter and would like to check on your application, you can contact the office where it was lodged. Contact information for our offices around the world can be found here -
https://www.border.gov.au/about/contact/offices-locations