ranieri? he will be judged on 2 things - results and performance of the team. If he wins the league or UCL OR fail to qualify for next UCL, its safe to say performance will matter less. If he only Q-fies for UCL, then performance probabbly will be key.
I believe it's a combination of Ranieri and upper management.
The transfer policies + Ranieri's starting 11, preferred players, post match reactions etc.
Under Lippi, when Juventus would lose a match, he would admit defeat, analyze the weakness in his post match comments, and bounce right back gradually in the next games. Look at his results with Juve in Scudetto winning seasons: you'll always find like one month where results were poor, where a tough spell was experienced, but he maintained control afterwards.
Under Capello we were at an airtight midfield + defense...with the inability to create anything beautiful in terms of attacking play.
With Ranieri, the team has some weak links which need to be addressed. His team struggles to form a good attack and keep lot's of ball possession - and when the old brigade players such as Del Piero or Nedved show up that's proving to be the turning point in some of our games. Likewise Amauri has shown up as well, sometimes.
It's not like in August 2008, Juve fans were expecting to win Serie A with flying colors; but before the winning streak we noticed some loss of control over the team. There was an injury crisis, and on top of that the cards were played wrong during the games.
Agreed with earlier comments that he shouldn't be axed now - because we don't need imbalance in the team.
But in terms of Cobolli's long-term-we're-building-a-team-to-win-Serie-A-project...I don't see this vision being fulfilled at the current rate.