COPERTURA/ COVERING
It is s fundamental action and concept, especially for male voices and tenors.
It has become in one way of it – in the last decades- a sort of one size fit all with very little nuancing so to show its limits.
It is the version of the hyperhyped tenor and vocal coach Luciano Pavarotti and Seth Riggs. They are well deserved hyperhiped, but it had taken away perspective and freshness in separating the stylistic or convenience of the choice from the necessary physiology for it.
Stylistic does not contain all the individual possibilities.
Convenient does not contain optimal.
If you want your style or you go for your optimal then copertura can be acquired and obtained by many more actions – just some in common with Pavarotti/Riggs way.

Three aspects of it to start nuancing the question