Puel on a run of 1 win in 7, we sack Puel, Rodger comes in 26 of February, managed his first game on 3rd of March and win 4 out of 5.
Shakespeare on a run of 1 win in 7, sacked 17th of October, we Puel comes in on the 25th of October wins 4 and Draw 2 of the next 7.
Just from our own history it's possible to have a quick change on fortunes with little time on the training ground.