Lean toolkit · Notion template

A3 Problem Solving & Root Cause Tracker

A Notion template for A3 reports and root cause analysis, with a 6M fishbone, 5 Whys, PDCA stages and a check log

An A3 puts one problem on one page. This Notion template turns A3 problem solving into a connected workspace: you write the problem in numbers, find the verified root cause with a 6M fishbone and 5 Whys, give every countermeasure an owner, and log readings until the result is proven.

Formulas work from the numbers you enter. They show PDCA progress, % to target, a health label and overdue flags, and an A3 check lists what is still missing. It is made for teams who want a clear, repeatable way to solve recurring problems, on the shop floor or in the office.

$29Pay once, no subscription · checkout on Etsy or Gumroad

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Watch the Short about A3 Problem Solving & Root Cause Tracker on YouTube · 20 s

The template

What's inside

A3 Reports: one page per problem
Each A3 is one page in the classic eight sections: background, current condition, goal, root cause analysis, countermeasures, plan, check, and standardize & share. The New A3 template lays them out in two columns with prompts, a plan table, a standardize checklist, a "Questions a good coach asks" toggle and a fishbone board filtered to that A3.
PDCA stage, health and next step
An A3 moves through seven stages (four Plan steps, then Implement, Check results and Standardize) before it is closed. A progress bar, a health label and a Next step sentence are pinned at the top of the page, and an A3 check lists what is still missing, such as a baseline, a verified root cause or a countermeasure for each root cause.
A metric with % to target
Every A3 has a metric with a baseline, a target and the latest reading. % to target is the share of the gap that has been closed, (baseline − latest) ÷ (baseline − target), so it works whether your number should go down (defects, minutes lost) or up (yield, on-time %).
Causes: 6M fishbone and 5 Whys
Causes sit on a board under Man (people), Machine, Method, Material, Measurement and Environment, and the strongest are chained in a 5 Whys table, one row per why level. Each cause is marked verified by data, verified by observation or ruled out, with the evidence next to it.
Countermeasures, including poka-yoke
Each countermeasure is typed as contain, corrective, preventive or poka-yoke and has an owner, a due date, an effect check and an automatic overdue flag. A Countermeasures done bar on each A3 shows how many are done out of done plus open, so cancelled ones do not count.
Check Log
Log dated readings in the A3's own metric, each marked Before, Trial or After. Every reading shows its own % bar, so you can see the gap close without a chart.
Lessons & Standards
A library for updated standard work, one-point lessons, checklists, training and sharing a fix with similar areas (yokoten). Each entry can have a review date, and a Review due view lists the entries whose review date is within the next month or already past.
Dashboard, guides and sample A3s
The dashboard shows open A3s by PDCA stage, countermeasures that are overdue or due in the next seven days, A3s waiting for a check and recently closed A3s, with New A3 and Log a reading buttons. A Start Here page, a Method Guide (problem statements, fishbone, 5 Whys, PDCA, countermeasure types) and five fictional sample A3s come with it.

A closer look

What it looks like

Dashboard: a board of four open A3s by PDCA stage, each with a progress bar and health label, above a table of two countermeasures, one overdue by 5 days. — The dashboard with the sample data: open A3s by PDCA stage, then the countermeasures that are overdue or due soon.

A3 page titled Pouch seal leaks on Line 2: stage Closed, 109% to target, and eight numbered sections in two columns, from Background to Standardize & share. — One A3 page: the eight sections in two columns, with stage, progress, health, % to target and the next step pinned at the top.

Fishbone board: eight cause cards under six 6M headings, marked ruled out, verified or root cause, above a 5 Whys table from Why 1 to a root cause at Why 4. — Root cause analysis: causes sorted on the 6M fishbone board, then one 5 Whys chain with the verification and evidence for each why.

Sample A3 with four countermeasures, all marked Effective, beside a check log of six readings whose % to target bars rise to 109%; baseline 3.2, now 0.8. — A fictional worked example: four countermeasures, one of each type, and check log readings that take leaking pouches from a 3.2% baseline to 0.8%.

Getting started

How it works

Duplicate and set up
Duplicate the template into your Notion workspace and open Start Here. Look at the closed example, rename the areas to your lines or departments, and clear the sample records when you are ready.
Define the problem
Click New A3. Write the current condition in numbers and set a dated target.
Find the root cause
Add causes to the fishbone, check them where the work happens, then run 5 Whys on the strongest. Tick Root cause only when it is verified.
Add countermeasures
Give each root cause a countermeasure with an owner, a due date and a note on how you will know it worked.
Check and standardize
Log readings and move the A3 through Do, Check and Act until the result holds. Record the updated standard or lesson in Lessons & Standards.

Who it's for

Lean and continuous-improvement leads
Quality and production engineers
Team leaders and small operations teams who want a clear, repeatable way to solve recurring problems
Office teams too: one of the sample A3s is about export invoices sent back for corrections

What you need

A Notion account. The template works on Notion's Free plan: it uses databases, formulas, rollups and standard buttons, with no charts, automations or Notion AI.
A computer for the setup: open the template link in a desktop browser, sign in to Notion and duplicate the template into your workspace. Start Here then takes about 10 minutes.
On Etsy you download a PDF with the template link, a QR code and setup steps.
On Gumroad you get the template link right after checkout, with a PDF that has the same link, a QR code and a quick-start guide.
What you get: five connected databases (A3 Reports, Causes, Countermeasures, Check Log, Lessons & Standards), six page templates (New A3, New cause, New countermeasure, Poka-yoke device, New reading, New standard or lesson), the dashboard, a Start Here page and a Method Guide.
Sample data: five fictional sample A3s from a small snack-packing plant, each at a different PDCA stage, one of them closed with full check data. Every sample record has Example ticked, and each database has an Examples view where you select the rows and delete them.
The template is in English.

Before you buy

Questions about this template

Does % to target work if my metric should go up?

Yes. % to target compares the latest reading with the baseline and the target, so falling defects and rising yield both work. 100% means the target is met, and the field stays empty until the A3 has a baseline, a target and at least one reading.

Can Notion draw a real fishbone diagram?

Causes sit on a board grouped by the six Ms, which works like a fishbone you can sort and filter. Each cause can then be chained with 5 Whys.

Can I use it outside manufacturing?

Yes. One sample A3 is about export invoices in an office. It is your copy: rename the areas and the 6M labels to suit your work, and add fields if you need them.

Will owners get reminders when a countermeasure is due?

No. Owner and Coach are plain-text fields, so nobody is notified and nothing is sent. The dashboard lists the countermeasures that are overdue or due soon.

Is this template part of the Lean Toolkit Bundle?

Yes. On its own it is $29. The Lean Toolkit Bundle has all five lean templates (5S, Kaizen, A3, Gemba & SQDCP, OEE & TPM) for $79; bought one by one they come to $145, so the bundle saves $66.

Delivery, refunds and choosing Etsy or Gumroad: see the main FAQ