Put it this way, if Unsy wins two out of the three games before the international break - Leicester (A), Lyon (A), and Watford (H), I'll be convinced and happy enough for him to be given the job.
It's not much to go on I'll admit, but a couple of decent results would show that there has been a sufficient up-turn in form and the players are responding to him. It's also perhaps a reflection that there doesn't seem to be one candidate out there who is clearly head and shoulders above all others; well not to me anyway. Tuchel, Dyche, and Marco Silva have had their moments; Ancelotti is the one with the most impressive CV clearly, but I'm not convinced he could be persuaded to come to us.