Which factors determine the job-security of a manager (besides losing/winning of course)?

[rschprs]

Which factors determine the job-security of a manager? What do I have to set in the editor to make a manager's job less secure, and where? Can I adjust the patience of the chairperson, or are there other factors. 

I'm testing to see how long it takes for a manager to get sacket at a high profile club by reloading the game and making them lose every single game. The manager is there after 10 losses (even against rivals) and his job is secure. 

 

Thanks