'Appointing' in the Bible

Along with him I'm appointing Ahisamach's son Oholiab from the tribe of Dan, and I've given wisdom to all who are skilled so they can make everything that I've commanded you,

Is it such an insignificant thing to you that the God of Israel has separated you from the Israelis to draw you to himself, appointing you to do the work of the tent of the LORD and to stand before the community to minister to them?

and appointing judges throughout the land in all of the walled cities of Judah, city by city. He issued this reminder to the judges:

"Against the shepherds my anger rises I am punishing the leaders also, because the LORD of the Heavenly Armies has visited his flock, the house of Judah, appointing them as his royal war horse for battle.

"The Lord answered, "I'm Jesus, whom you are persecuting. But get up and stand on your feet, because I've appeared to you for the very purpose of appointing you to be my servant and witness of what you've seen and of what I'll show you.

Now if perfection could have been attained through the Levitical priesthood for on this basis the people received the Law what further need would there be to speak of appointing another kind of priest according to the order of Melchizedek, not one according to the order of Aaron?