The Hairdresser skills assessment for Australian migration is a 2 stage approach. You need to prove to the assessor you have the necessary skills as a Hairdresser.
The first stage is paper based, proving you are a Hairdresser though payslips, detailed CV, references, videos, photos, qualifications. This is called the documentary assessment for the Hairdresser skills assessment Australia.
The second stage is a technical interview with an Australian qualified Hairdresser and is also a qualified trainer and assessor. This is a relaxed chat over Skype or Zoom where the Hairdressing assessor will discuss your application and ask questions related to Hairdressing skills.