02 · Ideate Diverge ✦ AI plays: Generator

Brainwriting

Silent rounds of writing and passing sheets, so every voice adds ideas and builds on everyone else's.

Best for
Quiet or uneven groupswhen a few voices usually dominate
Time
20–40 minutes6-3-5: six rounds of about five minutes
People
Team6 is classic; works from 4 to 30+
Difficulty
Beginnereasier to run well than a brainstorm
Origin
Bernd Rohrbach, 1968who published the 6-3-5 method
01 What it is

Brainstorming on paper, where every voice counts.

Brainwriting is brainstorming without the talking. Everyone writes ideas on a sheet, then passes it on. The next person reads what's there, adds new ideas, often building on the ones before, and passes it again. After a few rounds each sheet holds a chain of ideas written by the whole group.

The best-known version is 6-3-5: six people each write three ideas in five minutes, then pass. Six rounds later, in about half an hour, the group has up to 108 ideas. Because everyone writes at once, nobody waits for a turn, nobody gets interrupted, and the quietest person contributes as much as the loudest.

You can loosen the format: more people, a pool of sheets in the middle of the table to swap from, or a shared online document. The core stays the same: write alone, read the others, build, pass.

Use it when your group mixes quiet people with strong personalities or different ranks, when you have more people than a spoken brainstorm can handle, or when you want ideas that build on each other without debate.

Where it comes from. In 1968 Bernd Rohrbach, writing in Germany, described the 6-3-5 method as a disciplined way to get a group's ideas onto paper. Many looser versions have grown up around it since, from shared idea pools to online templates.
1Read2Build3Add new4PassHarvestrepeat

Each round: read, build, add, pass. In 6-3-5 the loop runs six times, about five minutes each.

Choose a part of the diagram or a tab to explore each move.

1

Read the sheet

The question, plus every idea already written

What has the group already written on the sheet in front of you?

  • Reread the question at the top, every round
  • Scan all the earlier ideas before you write anything
  • Notice which ideas spark something, even sideways
Street fairRound 3: the sheet already holds a volunteer raffle, 30-minute micro-shifts and a “bring a neighbor” badge.
2

Build on what's there

Extend, combine or twist an earlier idea

Which idea on this sheet could you push further, flip or merge with another?

  • Take an idea one step further: bigger, sooner or simpler
  • Combine two ideas on the sheet into a third
  • Turn a weak idea around: what would make it work?
Street fairMicro-shifts plus the badge: anyone who does two 30-minute shifts gets a free fair T-shirt.
3

Add something new

An angle the sheet is still missing

What direction has nobody on this sheet tried yet?

  • Who isn't represented yet: kids, older residents, shops?
  • Write one idea that would surprise the group
  • Don't repeat what you wrote on earlier sheets
Street fairMissing angle: teenagers. Idea: high schoolers earn service hours by running the kids' zone.
4

Pass it on

On the signal, every sheet moves one seat

Is your row complete and readable, so the next person can build on it?

  • Fill all three boxes, even with a rough idea
  • Write clearly: nobody can ask what you meant
  • Pass on the signal, so every sheet moves at once
Street fairTime's up: six sheets move one seat to the left. Six rounds later the fair has up to 108 ideas.
02 Why it works

Why silent writing beats talking in turns

Brainwriting keeps what's good about brainstorming, ideas sparking ideas, and removes the problems that come with talking.

1

Everyone works at once

In a spoken session only one person can talk at a time, and others lose ideas while they wait. Researchers call this production blocking. When everyone writes in parallel, nobody waits, so a group of six can produce far more in the same half hour.

2

Quiet voices count equally

Nobody has to win the floor, and ideas aren't judged by who said them. Shy people, newcomers and junior staff contribute exactly as much as anyone else, and ideas that would never be said aloud get written down.

3

Ideas still build on ideas

Reading the sheet before you write is the brainstorming effect in slow motion. Each person meets other people's thinking, takes it somewhere new and passes it on. Good ideas often end up with three or four authors.

4

Everything is visible

Every idea is written, so nothing gets lost or misremembered. The sheets become a record of how ideas grew, and the harvest starts with a complete list instead of a scribe's hurried notes.

03 How to use it

Run a brainwriting session in six steps

  1. Write the question 5 min

    Agree on one “How might we…?” question and write it at the top of every sheet. Below it draw a grid: six rows of three boxes for 6-3-5, or as many rows as fit.

  2. Seat the group 2 min

    Sit people in a circle or around a table so sheets can pass in one direction. Six is classic. With more people, run several circles of 5–7, or keep spare sheets in a pool in the middle to swap from.

  3. Run round one 5 min

    Silence. Everyone writes three ideas in the first row of their sheet. Speed matters more than polish: a rough idea now is raw material for the next writer.

  4. Pass, read, build 5 min a round

    On the signal, pass the sheet. Read everything on it, then add three more ideas: build on what's there or take it somewhere new. Repeat until the sheets are full. If later rounds feel rushed, add a minute.

  5. Harvest and cluster 15 min

    Put the sheets on a wall or type them into one list. Read the ideas aloud, merge duplicates and group them into themes. Only now does discussion begin.

  6. Choose what to develop 10 min

    Give everyone a few dot votes, or score the leading ideas with a NUF Test. Credit the chain, not one person: most good ideas will have several authors.

✓Do

  • Keep the room silent during writing rounds
  • Use big boxes so ideas stay short and readable
  • Welcome rough, half-formed ideas; others will finish them
  • Read every idea on the sheet before adding yours

✕Avoid

  • Talking, explaining or defending ideas mid-round
  • Crossing out or commenting on others' ideas
  • Rounds so long that the energy drains away
  • Skipping the harvest; ideas left on sheets go nowhere

What you need

One sheet per person with the question on top and a 6×3 grid, pens, a timer and a quiet room. Online, give each person a shared document. With AI, use the prompt below.

04 Worked example

Brainwriting in action: the 4 p.m. discharge

The challenge

“We tell patients they'll go home in the morning, and most of them are still waiting at 4 p.m.”

Setting: a 30-bed hospital medical ward. Goal: most discharged patients home before 1 p.m. Constraint: no new staff. Group: six nurses, 6-3-5. Below is how one sheet grew, round by round.

6 nurses · 30 minutes
R1
Round 1

Write a planned go-home date on every patient's whiteboard on the first day of their stay.

R2
Round 2

Builds on R1: flag tomorrow's discharges at the evening handover, so the morning shift starts on them first.

R3
Round 3

New angle: the real hold-up is take-home medicines. Send those prescriptions to the pharmacy the evening before.

R4
Round 4

Combines R2 and R3: a 7 p.m. “tomorrow's leavers” checklist covering medicines ordered, ride confirmed and paperwork drafted.

R5
Round 5

Wild one: a discharge lounge, so patients wait for their ride in an armchair instead of a bed someone else needs.

R6
Round 6

Twist on R5: the lounge is also where a pharmacist explains new medicines to patients and their families.

All
All six sheets

97 ideas in 30 minutes. After merging duplicates, 61 remained, in five themes: planning, pharmacy, rides, paperwork and space.

The pick

The team chose to pilot the evening checklist for four weeks and compare discharge times before and after.

Top three after a quick NUF Test

Evening leavers' checklist
NEWUSEFULFEASIBLE
Discharge lounge
NEWUSEFULFEASIBLE
Go-home date on day one
NEWUSEFULFEASIBLE
05 ✦ Go AI

Brainwrite with AI as the extra seat

Brainwriting is already quiet and fair, so AI's job is to make it bigger and richer. It can take an extra seat in the rounds, write as people who aren't in the room, and turn a stack of handwritten sheets into a clean, clustered list. What it can't do is know your workplace, your team or what's been tried.

YouYou bring

  • The question, and the people who own it
  • Real experience of where the problem bites
  • Judgment about which chains of ideas matter
  • The commitment to test something

AIAI brings

  • An extra writer in every round, with fresh angles
  • Voices missing from the room, like customers
  • Fast typing-up and clustering of the sheets
  • Five simulated writers when you're working alone
MOVE 01

Fill a seat

Add AI as an extra writer: paste a sheet and ask for its row of three.

Here's our sheet so far: [ideas]. Add 3 ideas: one that builds on idea 2, one combination, one surprise.
MOVE 02

Missing voices

Ask for a round written by people who aren't at the table.

Write a round of 3 ideas as a first-week employee, then 3 as a frustrated customer, for: [question]
MOVE 03

Solo 6-3-5

Working alone? Let AI play five writers so your ideas still build round by round.

Run 6-3-5 with me as writer 1. You play writers 2-6. Pass me a new sheet after each round.
MOVE 04

Harvest fast

Type or photograph the sheets and let AI merge duplicates and group them into themes.

Here are 90 ideas from our sheets. Merge duplicates, group them into 5 themes, keep each idea's wording.

Watch out for

  • Humans write first. Add AI's row after people have written, so it builds on them, not the reverse.
  • Watch for bland builds. Ask AI to name the idea it's building on and say what it changes.
  • Clean the sheets first. Remove names, patient or client details and anything confidential.
  • Keep the original words. Clustering can flatten ideas. Keep each idea's wording visible.
06 Your prompt

Your 6-3-5 brainwriting coach, ready to paste

Describe your question, pick a mode, then copy the prompt into Claude, ChatGPT, Gemini or Copilot. In coach mode the AI runs silent 6-3-5 rounds with you: you write three ideas, it plays the other writers, and the sheets keep passing.

1 · Describe your challenge

The more specific you are, the better the result. The prompt updates as you type.

2 · Choose a mode

brainwriting.prompt
3 · Paste it into any AI assistant, or open it directly: Open in Claude ↗ Open in ChatGPT ↗

The “Open in” links put the prompt in the web address. If your challenge includes anything sensitive, copy and paste instead.

Keep going: follow-up prompts

After the session, click one to copy it, then paste it into the same chat.

Keep exploring

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