Scriptwriting in Pre-Production: A Filmmaker's Essential Guide

In pre-production, the script is the source document for every plan. Once you lock a draft, it is broken down scene by scene into cast, props, locations and other elements, and that breakdown drives the schedule, the budget, casting and the call sheets. Any change to the script after that point has to flow through to those plans, which is why scriptwriting does not stop when pre-production starts.

What role does the script play in pre-production?

The script tells every department what it has to prepare. Each team reads it for something different:

• Producer and assistant director: number of scenes, page count, locations and shoot days.
• Casting: speaking roles, extras, and how many days each actor works.
• Art department: props, set dressing and vehicles.
• Wardrobe and makeup: costume changes and continuity across scenes.
• Locations: every INT. and EXT. heading, and whether it is day or night.
• Director and cinematographer: the shot list and storyboards for each scene.

If the script is vague ("a crowded bar"), every department has to guess. Clear, specific scene headings and action lines save time for everyone downstream.

What should the writer check before the script is locked?

Before locking, the writer and producer should check that the script can be made with the money, time and people available. A practical checklist:

• Page count: roughly one page per minute of screen time. Many independent shoots plan somewhere around three to five pages a day, so pages translate directly into shoot days.
• Locations: each new location adds a company move or another day. Can two scenes share one place?
• Night exteriors: they need lighting, permits and later hours. Are they all essential?
• Cast size: every speaking role means another actor to cast, schedule and pay.
• Hard elements: stunts, animals, children, weapons, vehicles, water and visual effects all add cost and planning.
• Story clarity: is the middle tight, and does each scene earn its place? Overwritten scenes become overlong shoot days.

Script statistics make this check faster. Lowerated's Scriptwriter shows dialogue share per character, the day and night split, location usage and element counts, so you can see at a glance that, say, nine scenes happen at night in four different exteriors.

What does it mean to lock a script?

Locking a script means fixing the scene numbers and pages so every department plans from the same version. After lock, changes are still allowed, but they are issued as revision pages instead of a fresh draft.

Revisions usually follow a standard color sequence: white for the locked draft, then blue, pink, yellow, green, goldenrod, buff, salmon and cherry. Changed lines are marked, and new scenes get numbers like 12A so the existing numbering stays intact. That way a production manager can see exactly what changed and update the plan. Our post on understanding script revisions explains the process in detail. Lowerated's Scriptwriter supports drafts and revisions with revision colors.

How do you break down a script for production?

A script breakdown goes through the script scene by scene and lists every element the production must provide. For each scene you record:

• Scene number, heading (INT. or EXT., location) and day or night
• Length in eighths of a page
• Cast, extras and stand-ins
• Props, wardrobe, makeup and hair
• Vehicles, animals, special effects and special equipment
• Notes such as sound, stunts or safety requirements

Traditionally this was done with colored highlighters on paper. In Lowerated, you tag elements directly in the script across 21 element types plus custom ones. Tag a word once and every mention is tagged, or let Oli do a first tagging pass for you to review. The breakdown is built in place from those tags, so it updates with the script.

For a full walkthrough, read script breakdowns: turning a script into a plan.

How does the script become a shooting schedule?

The breakdown becomes a schedule by grouping scenes that share a location, time of day and cast, then ordering those groups into shoot days. Films are rarely shot in story order. All the scenes in one apartment are usually shot together, even if they are an hour apart in the film.

The classic tool is the stripboard: one strip per scene, color-coded for interior or exterior and day or night, arranged into days. Lowerated's stripboard lets you filter scenes (for example, all night scenes) and drag them into shoot days, and it warns you when a scene needs an actor who is marked unavailable that day.

From the schedule come the other working documents: the one-line schedule, the day out of days for cast, and call sheets for each day. Budgets are built from the same breakdown; see budgeting in pre-production.

The clip shows call sheets generated from a shooting schedule.

What happens when the script changes during pre-production?

When the script changes, the breakdown, schedule and budget have to change with it. A cut scene can free a day; a new character means another casting call. Problems start when the script lives in one file and the plan in several spreadsheets, and nobody notices that the props list still includes a scene that no longer exists.

Keeping the script and the plan in one project reduces that risk. In Lowerated's pre-production planner, tags, breakdown and schedule all read from the same screenplay, so a revision shows up where it matters.

What should writers do during pre-production?

Writers should stay available, because the script keeps changing until the last shoot day. Typical writer tasks in pre-production:

1. Rewrite scenes to fit real locations once they are scouted.
2. Trim or merge scenes when the schedule is too long.
3. Adjust dialogue after table reads and casting.
4. Cut or simplify expensive moments without losing what they do for the story.
5. Issue changes as proper revision pages so every department sees them.

Involving the director and producer early helps. A scene written with the budget in mind rarely needs a painful rewrite later.

FAQ

Is scriptwriting part of pre-production?

Writing the script usually happens in development, before pre-production. During pre-production the script is locked, broken down and revised as plans firm up.

When should a script be locked?

Lock it before detailed scheduling and budgeting start, usually once the producer and director agree the draft can be shot. Changes after that go out as colored revision pages.

How long does a script breakdown take?

For a short film, often a day or two. For a feature, several days by hand, less when tagging is done in software and checked by a person.

What is an eighth of a page?

Script pages are divided into eighths to measure scene length. Schedules use them to estimate how much can be shot in a day.

Key takeaways

• The locked script is the source for the breakdown, schedule, budget, casting and call sheets.
• Check page count, locations, night scenes and cast size against your resources before locking.
• After lock, issue changes as colored revision pages so every department stays on the same version.
• Tagging the script builds the breakdown; grouping scenes by location and cast builds the schedule.
• Keeping script and plan in one place means revisions reach the plan. Try Lowerated free.