What Does the Best Boy Do?

So the comment question of the hour seems to be "What is a Best Boy? and if he is female, does the job title become "Best Girl?""

The Best Boy is the Chief Lighting Technician's right hand man. When the Chief Lighting Technician gives an order from the Director of Photography, the Best Boy is near all of the lights to organize the gaffers and grips and get the proper lights set up in the proper places and set to the proper bright/dim settings.

The title can be changed to "Best Girl" and is in certain film credits, however, I don't think that if the "Best Boy" is female that is always the case.

The people who build the sets are called the "construction crew" because that is literally what they do: build a house or diner or car or whatever is required right on a studio sound stage.

For simple answers to various industry questions I refer you to the comedy styling of
Thomas F. Wilson , also known as Biff from "Back to the Future".