What a 1st AD Actually Does All Day: The Invisible Management Layer That Keeps a Set Running
The Person Who Runs the Set
On a professional film set, the director makes creative decisions. The producer controls the budget. The cinematographer designs the image. But none of those people physically run the set. The person who manages the physical execution of a shooting day -- who moves the company from setup to setup, maintains the schedule, communicates between departments, manages safety protocols, and is ultimately responsible for the cast and crew calling wrap on time -- is the first assistant director.
Most first-time filmmakers know what a director does and roughly what a producer does. The 1st AD role is less understood because it is invisible when functioning correctly. A shooting day where the 1st AD's work is most apparent is usually a bad shooting day: scenes falling behind, departments waiting on each other, cast standing in costume for forty minutes while a light is repositioned, a rushed lunch break that violates labor agreements.
When the 1st AD's system is working, none of that is visible. The director steps on set and the camera is dressed. The cast arrives in hair and makeup at the precise moment they are needed. Departments know what the next setup is before the current one wraps. The shooting day ends close to schedule.
This post maps what a 1st AD actually does from the beginning of prep through the shooting day. The Production Schedule Calculator and Call Sheet Generator both handle the calculations that sit at the center of the 1st AD's daily workflow.
Information on labor agreements and DGA standards reflects the DGA Low Budget Agreement and SAG-AFTRA Ultra Low Budget Agreement provisions current as of 2025.
Prep: The Six Weeks Before Principal Photography
The 1st AD's work begins 4 to 6 weeks before the first day of principal photography, depending on the scale of the production. The prep work falls into three categories: the breakdown, the schedule, and the logistics.
The script breakdown. The 1st AD reads the script and breaks it down scene by scene, extracting every production element: cast members, locations, props, vehicles, special effects, stunts, extras requirements, day and night specifications, weather conditions, and any other element that affects how long the scene will take to shoot. This breakdown is the foundation of the schedule.
The schedule. Using the breakdown, the 1st AD builds the shooting schedule. The primary objective is to group scenes efficiently -- by location, by cast availability, by day or night requirements -- to minimize company moves, maximize cast efficiency, and stay within the production's total shooting day count. On a union production, the 1st AD works within strict constraints on turnaround times, meal break intervals, and day-out-of-days (the spread of each cast member's paid shooting days).
The logistics. As shooting approaches, the 1st AD coordinates with every department head to confirm readiness: is the art department's location build on schedule? Has the 2nd AD confirmed all cast transportation? Are there any outstanding permit issues with the location department? The 1st AD is the single point of contact for production-wide communication in the weeks before shooting.
Use the Production Schedule Calculator to model the shooting day count from scene count and average setup complexity before the 1st AD builds the strip board. Producers who arrive at prep with an accurate projected shooting day count give the 1st AD a realistic starting point; producers who arrive with an unrealistic optimistic count force the 1st AD to negotiate down a schedule that was never achievable.
The Call Sheet: The Daily Command Document
Every shooting day begins with a call sheet distributed to the full company the evening before. The call sheet is the 1st AD's primary instrument: it specifies the shooting day's scene list, shooting order, cast calls, crew calls, location address and parking instructions, weather, and department-specific notes.
The call sheet communicates three things to every person on the crew:
- When they need to be at work
- Where they need to be
- What the day's objectives are and in what order
A well-constructed call sheet eliminates the need for most morning questions and allows every department to prepare for the day's sequence of setups independently. The Call Sheet Generator handles the formatting and distribution logic for productions that manage call sheets digitally.
On the call sheet, the 1st AD estimates the time required for each scene listed, building a projected timeline that the director and department heads can reference throughout the day. This projection almost never matches reality exactly, but it provides a shared baseline against which the 1st AD can identify when the company is running behind and by how much.
On Set: The Hour-by-Hour Work
The 1st AD's day begins before the crew arrives. A typical first setup is called for a specific time; the 1st AD is usually on set 30 to 45 minutes before to confirm that lighting is dressed, the director has seen the set, and the camera department is ready to receive the first cast.
"Roll sound." "Roll camera." "Action." These are the 1st AD's calls. On a professional set, nothing happens without the 1st AD calling it. The 1st AD checks with each department head before calling roll to confirm readiness. When an inexperienced director calls action before the 1st AD has cleared the set, it is a breach of the established protocol that can cause safety problems and waste takes.
Between setups, the 1st AD is simultaneously monitoring five things:
- The current setup: is it falling behind the estimate, and by how many minutes?
- The next setup: have all departments been given a heads-up to begin their transitions?
- The cast: are the actors in the current scene being held, and do they need anything? Are the actors in the next scene in makeup and costume?
- The department heads: does any department need a decision from the director that is blocking their prep for the next setup?
- The schedule: how many scenes remain, and is the current day's scene list achievable within the available shooting hours?
This is not sequential management but simultaneous monitoring. A 1st AD who can only handle one thing at a time cannot manage a professional set.
The Three Real-World Scenarios
Scenario 1: The day falls behind in the first hour.
A complex lighting setup takes 90 minutes instead of 45. The 1st AD recalculates the day: if 45 minutes of the schedule are already lost and there are 10 scenes remaining with a 12-hour shooting day, something must be dropped or simplified. The 1st AD consults with the director to identify the lowest-priority scenes. Those scenes are either simplified, moved to another day, or dropped, and the call sheet is mentally updated in real time for the rest of the day.
Scenario 2: A cast member arrives late.
A principal actor's transportation was delayed and they will arrive 45 minutes late. The 1st AD immediately reorders the shooting day to move their scenes later and fill the gap with scenes that do not require that actor. This requires knowing the entire shooting day's scene list well enough to identify substitution options without consulting any document.
Scenario 3: A department discovers a problem mid-day.
The art department's props for scene 14 are missing. Scene 14 is scheduled for 2pm. The 1st AD has 2 hours to either source replacement props or move scene 14 out of the day and replace it with a scene that can be shot with available resources. Neither option is easy; both require immediate communication with the director, the art department, and the producer simultaneously.
1st AD Responsibilities by Phase
| Phase | Primary Responsibilities |
|---|---|
| Prep (weeks 4-6) | Script breakdown, shooting schedule build |
| Prep (weeks 1-3) | Call sheets, department coordination, logistics |
| Shooting day (morning) | Call sheet distribution, first setup confirmation |
| Shooting day (on set) | Rolling camera, managing pace, department communication |
| Shooting day (afternoon) | Schedule management, end-of-day scene decisions |
| Wrap | Wrap call, next day call confirmation, day report |
| Post-production | Not typically involved unless reshoots are scheduled |
Pro Tips and Common Mistakes
Pro Tip: The best 1st ADs maintain a private time log throughout the shooting day. They note the actual time each setup began and wrapped against the estimated time on the call sheet. This log lets them calculate accumulated time loss in real time and make informed decisions about what to cut or simplify. Without this log, the end-of-day panic is a surprise; with it, the schedule adjustment is made at 2pm rather than 5pm.
Pro Tip: A 1st AD's most valuable relationships are with the director of photography and the department heads, not with the director. The DP determines how long each lighting setup takes. The department heads determine how quickly each department can transition between setups. Knowing those people's working speeds and constraints is what separates a 1st AD who can predict a shooting day's progress from one who can only react to it.
Pro Tip: On micro-budget productions without union minimums, the 1st AD function is sometimes combined with other roles. This works at the smallest scales (2 to 5 person crews) but breaks down quickly on productions with more than 10 crew members. At that scale, the management overhead of the 1st AD function is a full-time job. Trying to be both 1st AD and DP simultaneously on a 15-person crew produces a director who is confused about why everything runs late.
Common Mistake: Giving optimistic scene estimates on the call sheet to avoid alarming the director or producer about the day's difficulty. If a scene is a complex 5-page dialogue exchange with 6 cast members and will take 4 hours, the call sheet should reflect that. A 2-hour estimate that produces a 4-hour reality gives the company 2 hours of false comfort followed by a chaotic end-of-day scramble.
Common Mistake: Not using the Crew Size Estimator during prep to right-size the crew for the day's requirements. A shooting day with 3 cast members in 2 simple interior locations does not require the same crew depth as a day with 8 cast members in a complex practical location with vehicle work. Over-calling crew wastes budget; under-calling it creates the conditions for the problems the 1st AD spends the day managing.
Frequently Asked Questions
What is the difference between a 1st AD and a 2nd AD?
The 1st AD manages the set and the shooting day. The 2nd AD manages the cast off set: transportation, hair and makeup calls, holding area management, and the paperwork that documents who worked on what day. On a professional production, the 2nd AD is the first point of contact for cast between their trailer and the set. The 1st AD receives cast from the 2nd AD when they are ready to be brought to set.
Does the 1st AD need to be a DGA member?
On a production operating under the DGA Low Budget Agreement or Basic Agreement, the 1st AD must be a DGA member. For non-union productions, DGA membership is not required, but many experienced 1st ADs are DGA members even on non-union sets because their career track has brought them through union productions. For SAG-AFTRA Ultra Low Budget productions, non-union 1st ADs are permitted.
Can a first-time director function without a 1st AD?
On a very small production, yes. On any production with more than 8 crew members and more than 5 shooting days, a dedicated 1st AD -- even an inexperienced one learning the role -- produces meaningfully better shooting day outcomes than a director trying to simultaneously make creative decisions and manage set flow. The cognitive cost of managing time and departments while also directing performance is prohibitive above a certain scale.
What does "first team" and "second team" mean?
First team refers to the principal cast members who will be in the shot. Second team refers to stand-ins who replicate the cast's positions during lighting setup so the first team can rest in their trailers or in hair and makeup. The 1st AD calls "first team in" when the lighting and camera work with second team is complete and the set is ready for the actual cast to step into.
Related Tools
The Call Sheet Generator creates professional call sheets from the scene list, cast calls, and location information. For the schedule that feeds into the call sheet, the Production Schedule Calculator provides a projected shooting day count from script breakdown data. For crew sizing decisions across each shooting day, the Crew Size Estimator maps production scale to department requirements.
For a practical walkthrough of the scheduling process itself, How to Schedule an Indie Feature: A First AD's Step-by-Step Guide covers the strip board methodology in detail.
The Set Does Not Run Itself
Every director who has worked with an excellent 1st AD and then worked without one describes the same experience: they did not know how much work the 1st AD was doing until it was not being done.
The 1st AD role is invisible from the outside because its success is defined by the absence of problems. The shooting day runs close to schedule, departments are never waiting on each other, the director has time to think about performance. None of that happens by accident.
If you have worked as a 1st AD or with one, what is the single skill or habit that separates an excellent 1st AD from an average one in your experience?
