How to Write an SOP (With a Manufacturing Example)

TL;DR

To write an SOP, pick one task, watch or film the person who does it best, and write the purpose, when to do it, numbered steps with one action each, and what done looks like. Then test it with a new person and put it where the work happens. This guide includes a full manufacturing SOP you can copy.

• Document only three processes first: the tasks that break with new hires, draw repeat complaints, or only one person knows.
• The four-part SOP format is: what it’s for, when to do it, the numbered steps, and what done looks like.
• If you can do a task, film it on a phone instead of writing it; the video becomes the SOP.
• ChatGPT can draft a generic SOP in 30 seconds but cannot watch your work or know your specific tolerances, so always edit by hand.
• SOPX turns a phone or screen recording into a structured SOP with step-by-step video clips, annotations, and translation into 50+ languages.

How to write an SOP in 7 steps

1. Pick one task. Start with a task that goes wrong with new hires, or that only one person knows.
2. Watch or film the person who does it best. Write what they actually do, not what the old document says.
3. Write what it is for and when to do it. One sentence each.
4. Write the steps. Number them. One action per step, and start each step with a verb.
5. Add key points and pictures where people make mistakes. A photo or short clip beats a paragraph.
6. Test it with a new person. Every place they hesitate is a missing step. Fix it.
7. Put it where the work happens, and give it an owner. On a phone or a QR code at the machine, with one person who keeps it current.

Writing the SOP is the easy part. The hard part is making sure your team reads it, follows it, and updates it when things change. The rest of this guide covers what to document first, the format, a full example, and which tool to use at each stage. SOPs are one type of process documentation, and the same rules apply to work instructions and checklists.

Start with the SOPs that hurt the most

Don’t try to document your whole business. You’ll burn out before week two.

Pick the three tasks that meet any of these criteria:

• Something goes wrong when a new hire does it
• A customer has complained about it more than once
• Only one person on your team knows how to do it
• You get pulled away from real work to answer questions about it

If you run a manufacturing line or a food production unit, that usually means:

• Machine setup and changeover
• Daily startup and sanitation
• First-piece quality check

If you run a field service, HVAC, or plumbing team:

• Service call intake and dispatch
• Standard repair or install steps
• Job close-out and handoff

Write those three first. Everything else can wait.

The 4-part SOP format

A working SOP has four parts. That’s it.

1. What this is for. One sentence. “How to set up the CNC mill for a new job.”
2. When to do it. “Every time a new job starts on the machine.”
3. The steps. Numbered list. Short. One action per line.
4. What done looks like. “First part measured and inside tolerance, setup sheet signed.”

If your SOP is longer than one page, you’re probably overthinking it. Cut it down.

This four-part format is the floor, not the ceiling. Once you grow, hire faster, or face an audit, you’ll want a fuller header on each SOP with purpose, scope, responsibilities, safety, and references. That header is what turns a work instruction into a true SOP. If you reach that point, see what belongs in an SOP, and let the tool fill those sections for you instead of writing them by hand.

A real SOP, written out

Here’s a full manufacturing SOP using the format above. Copy it, swap the details for your shop, and you’ve got your first one done.

SOP: Job Setup on a CNC Milling Machine

What this is for: Set up the mill for a new job so the first part is right and no tool or fixture crashes.

When to do it: Every time a new job starts on the machine. The setter or a trained operator does this.

Steps:

1. Open the job folder. Confirm the drawing revision, program number, and material match the work order.
2. Clean the table and the fixture. Chips under a fixture throw off every part.
3. Mount the fixture and clamp it. Indicate it square to the table within the limit on the setup sheet.
4. Load the program. Check the program number on the screen against the work order.
5. Load the tools from the tool list. Check each tool number and length offset.
6. Set the work offset with the probe. Write the values on the setup sheet.
7. Run the program in single block with the feed override low. Watch the first move of every tool.
8. Cut the first part. Measure the critical dimensions marked on the drawing.
9. If any dimension is out, stop and call the lead. Do not adjust offsets alone on a new job.

What done looks like: First part measured and inside tolerance, values recorded, setup sheet signed. The next shift can see exactly how the machine was set up.

One page. Any setter can follow it. Any new operator can be trained on it.

If you want to see what this looks like as a digital SOP with step-by-step video clips, annotations, and on-screen guidance, here’s a public example of a machine setup SOP inside SOPX. Same 4-part format, but each step is a short video clip of the actual work, with arrows and callouts on the parts that matter.

You probably don’t have to write any of this

Here’s the part most SOP guides skip.

If you can do the task, you can film yourself doing it. Phone in your pocket, phone on a tripod, phone clipped to your hard hat. Doesn’t matter. The video is the SOP.

A worker doing a site prep, talking through what they’re checking. A foreman walking through a changeover. A senior operator setting up a machine they’ve run for fifteen years. The work is the documentation.

If you haven’t written your first SOP yet, don’t start by writing. Start by filming. Then either transcribe it manually (slow), or let AI turn the video into steps (fast). We cover that method in how to create SOPs with AI from video or PDF. The output is the same. You get a structured SOP with steps and visuals. You just skip the part where you sit at a desk.

This matters most for trades, manufacturing, food production, field service, and warehousing. Any work that doesn’t happen on a screen. ChatGPT can’t watch you do the work. A camera can.

Yes, you can use ChatGPT. Here’s how not to mess it up.

ChatGPT will draft a passable SOP in 30 seconds. The mistake people make is using the first draft as the final version.

A prompt that works:

“I run a small machine shop. Write a one-page SOP for setting up a CNC milling machine for a new job. Include the four sections: purpose, when to do it, steps, and what done looks like. Use simple language a new operator would understand.”

Then, before you publish:

• Read it out loud as if you’re training a new hire
• Cut any step that doesn’t apply to your shop
• Add steps the AI missed (it always misses something)
• Replace generic advice with your actual standards, tolerances, and supplier names

The draft is a starting point, not a finished SOP. ChatGPT writes what an SOP should look like in general. It can’t watch you do the actual work, and it doesn’t know the specific tolerances, brands, or quirks of your shop. If the process has any nuance, the AI guesses. If you already have the work on video, AI can structure that instead of guessing. We cover this in detail in our ChatGPT vs SOP software breakdown.

What about the material you already have?

Most operators already have raw material lying around. They just don’t think of it as documentation.

• Voice notes you sent yourself or a crew member explaining how to do something. That’s an SOP in audio form. Transcribe it, structure it, done.
• Old PDFs from manufacturers, suppliers, or whoever set up your machines. Most of them are 30 pages, scary-looking, ignored. You can convert a PDF into a structured digital SOP so your crew can follow it on their phone, step by step.
• Photos from job sites showing how something should look. Add captions, you’ve got visual standards. Pair them with steps, you’ve got an SOP.
• Random videos sitting on a phone or a USB drive: training walkthroughs, machine setups, troubleshooting clips. Drop them into a tool that breaks them into steps and they become reusable SOPs instead of a 47-minute video nobody watches.

The fastest path to your first 10 SOPs is rarely “open a blank doc.” It’s “look at what you already have.”

Choose your tool by stage, not by hype

Most SOP tool comparisons assume you need software from day one. You probably don’t. Here’s the honest version.

Stage 1: 1 to 5 people, fewer than 10 SOPs

Google Docs or Microsoft Word. Put them in one shared folder. Send the link to your team. That’s it.

You outgrow it when you can’t tell which file is the latest version. People keep using the old document. New hires can’t find anything. Your crew is in the field and the doc is on a desktop nobody opens.

Stage 2: 5 to 50 people, 10 to 50 SOPs

You need a tool that handles versioning, search, mobile access, and shareable links. The main options take different angles:

• Trainual is best if you want training modules with quizzes and a structured onboarding flow for office or service roles (Trainual alternative for video SOPs).
• Scribe is best if your SOPs are click-by-click software walkthroughs. It captures your screen, not your shop.
• Process Street is best if your processes are recurring checklists that someone has to tick off each time.
• SOPX is best if your work happens in the real world (not on a screen) and you don’t have time to write. Film the process on your phone, SOPX structures the video into step-by-step SOPs with video clips, annotations, and translations into 50+ languages. Or upload an existing PDF and get a structured digital SOP back in minutes. No writing required.

If your team works on a job site, on the floor, or around physical equipment, screen recorders don’t help. SOPX is built for that gap.

Stage 3: 50+ people, 50+ SOPs

At this point you’re picking based on integrations, permissions, multi-site rollout, and how much your team will use the tool. Run a 30-day trial with two or three options, watch which one your operators open without being told to, commit to that one.

For a broader comparison across stages, see our breakdown of the best SOP software in 2026.

The mistakes that kill SOP projects

Most SOP projects die for the same reasons. Avoid these.

• Documenting in a vacuum. Don’t write SOPs alone in a back office. Sit with the person who does the job. Better yet, film them doing it. Write what they actually do, not what you think they do.
• Trying to be complete. A 50-page SOP that nobody reads is worse than a one-page SOP that everyone follows.
• Treating SOPs as static. Your business changes. Your SOPs have to change with it. Pick a tool that makes updates fast, and review your top 10 SOPs every quarter.
• Skipping the “what done looks like” part. Without it, two people can both follow the same SOP and produce different results.
• Forcing field workers to read documents on a desktop. If your crew is on a job site or in front of a machine, they need to pull up an SOP on a phone, in five seconds, with no login friction. If your tool can’t do that, your team won’t use it.

When you outgrow Google Docs

You’ll know it’s time to switch when:

• You have more than 15 SOPs and people can’t find what they need
• New hires keep asking the same questions despite the docs existing
• Updates to one SOP never make it into related ones
• Half your team is following an old version
• The crew is in the field and asking the office over text instead of opening the doc

That’s when a real SOP platform starts paying for itself. Before that point, the tool isn’t your bottleneck. Writing (or filming) the first ten SOPs is.

The short version

1. Pick the three SOPs that cause the most pain
2. Write them in the one-page format above (steal the worked example)
3. Better yet, film the work instead of writing it
4. Use ChatGPT to draft, but always edit by hand
5. Put them in Google Docs until you outgrow it
6. Switch to a tool that fits how your team works

Don’t buy software before you’ve written your first five SOPs. Don’t write your first five SOPs without sitting next to (or filming) the person who does the job.

Film one tomorrow

If your processes happen in the real world (concrete sites, machine floors, kitchens, warehouses, service calls), the fastest first SOP isn’t a Word doc. It’s a phone in your pocket.

Film one process on your next job or shift. Upload the video to SOPX. You’ll have a structured, shareable SOP with step-by-step video clips and annotations, before lunch. No writing required.

Start free at sopx.io. 5 AI-generated SOPs, no credit card.

Frequently Asked Questions

How long should an SOP be?

As short as possible without skipping critical steps. One page is a good target for most operational SOPs. If yours is longer than two pages, either the process is too big (split it into multiple SOPs) or you’re over-explaining (cut filler).

Do I really need software to manage SOPs?

Not at first. Google Docs or Word is fine for your first 5 to 10 SOPs. You’ll know it’s time to switch when people can’t find the latest version, the crew can’t pull up SOPs on a phone, or you spend more time managing documents than improving processes.

Can ChatGPT write SOPs for me?

ChatGPT can draft a generic SOP in 30 seconds. It can’t watch your actual work, and it doesn’t know your shop’s specific standards or tolerances. Use it as a starting point. Always edit by hand. Better yet, document the real process (video, photos, voice notes) instead of generating a guess.

How often should I update SOPs?

Review your top 10 SOPs every quarter. Update any SOP immediately if the process changes (new equipment, new supplier, new safety rule). If updates feel heavy, your tool is wrong, not your team.

What is the difference between an SOP and a checklist?

A checklist is a list of items to confirm. An SOP includes the steps, the standards, and what “done” looks like. A checklist is usually part of an SOP. An SOP without a checklist often gets ignored. A checklist without the SOP context often gets followed wrongly.

Do I need separate SOPs for each language my team speaks?

Yes, but you don’t need to write them twice. Tools like SOPX translate any SOP into 50+ languages in seconds, with the same video clips and visuals. Foreign workers can follow the same procedure in their first language without you maintaining two sets of documents.

Where do I store SOPs so my team actually uses them?

Wherever they can pull them up in five seconds on a phone, with no login confusion. A shared Google Drive folder works for small teams. As you grow, a tool with search, QR codes, and shareable links removes friction. If your operators need to ask someone else where the SOP is, the storage solution is wrong.