Breakdown of Est-ce que la méthode est nouvelle ? Alors il faut l'analyser !
être
to be
est-ce que
is it that / do / does (question marker)
nouveau
new
il
it (impersonal subject)
Questions & Answers about Est-ce que la méthode est nouvelle ? Alors il faut l'analyser !
Why is alors used here instead of donc?
Does il faut mean "he must"?
Not in this case! Il faut is a set phrase meaning "it is necessary to" or "we/one must". The il here is impersonal, like the "it" in "it is raining" (il pleut), so it doesn't refer to a specific person.
What does the l' in l'analyser do?