COACHING FILM HUB
The First Assistant Director is responsible for breaking down all elements presented in a script, working with the Director and the DP (Director of Photography) to develop the shooting plan and schedule, and then making it all actually happen on set. A 1st AD must be a strong leader throughout both prep and the shoot, as well as a brilliant puzzle-master with an excellent mind for logistics, understanding of camera angles and techniques, and great communications skills.
Defined By The D.G.C
(Director's Guild of Canada)

A 2nd Assistant Director must be a genius organizer and communicator, as his/her function is to create the daily call sheet and all related prep and shoot documentation in consultation with the 1st AD and all Department Heads, ensuring that all required elements are reflected and scheduled for each day of the shoot.
Defined By The D.G.C
(Director's Guild of Canada)

The 3rd Assistant Director works directly with the 1st AD on set to make sure operations are running smoothly. 3rd ADs work closely with both principal and background performers, as well as the crew, keeping everyone informed of the needs of the set.
Defined By The D.G.C
(Director's Guild of Canada)

Typically, a 4th Assistant Director works at the trailers with and under the supervision of the 2nd AD. Generally, the 4AD manages cast while they are undergoing hair/makeup/wardrobe preparations, and keeps them informed of timing needs for set, while helping the 2nd AD with other administrative or communications tasks.
Defined By The D.G.C
(Director's Guild of Canada)
