Page "Assistant director" Paragraph 7

* The Additional Assistant Director ( AAD or Additional ) or Fourth Assistant Director ( 4AD or " Fourth ") or " Key Production Assistant!

" ( Key PA ) may have a number of duties.

Most commonly, the AAD has two broad job functions.

One is the contraction of the duties of an AD where the AD acts as both 2nd AD and 3rd AD simultaneously.

For example, a production with a large number of cast may pass the 2AD call sheet production work to that of the AAD, especially when the 2AD is already performing the additional work of a 3rd AD.

The other main use of an AAD is as an adjunct to the 3AD and 1AD for logistically large scenes where more ADs are needed to control large numbers of extras.

The " Additional " may also serve where the complexity of the scene or specialized elements within it ( stunts, period work ) require or are best served by a dedicated AD in most respects equal to a 1st AD-directing and controlling a number of other ADs to direct action to the satisfaction of the 1AD and the director.