They will look at our training, leadership, processes, systems and standards of behaviour, and examine cases where officers have let the public down.
It came as a high-profile claimed that she was flashed by Couzens in 2008 - but police 'laughed in her face' when she reported it.
They also suggested bus drivers could end up being arrested if they stopped to help.
Scotland Yard was accused of pouring scorn on frightened women earlier this month after the London force's strategy urged them to attract attention if they fear being abducted by police.
This person will also work alongside me, challenging my senior team and our leadership on standards, corruption, sexual misconduct and how the Met responds when things go wrong.
The inquiry will be split into two parts, with the first examining Couzens' previous behaviour.
Couzens returned the hire car on the same day, and later drove to , Kent, in his personal car, where he disposed of Everard's mobile phone in one of the town's watercourses.
On 12 March, Everard's body was identified through.