I am one of several moderators on my site. Sometimes another moderator handles an issue in a way I disagree with strongly -- deleted something, closed a question I thought should stay open, etc. For the sake of this question, assume that these actions are publicly visible (I'm not talking about, say, private actions with users).
Since the action was public, maybe I should raise my objection publicly, the same way any user would or could. On the other hand, perhaps maintaining a unified appearance among all the mods is important. On the third hand, maybe mods shouldn't be deciding privately things that could be discussed in public with broader input. And I've exceeded my hand limit, but there are probably yet other factors.
So, how should I decide where and how to question or challenge another moderator's action?