A3 Problem Solving: One Page to Fix a Real Jewellery Problem

Some problems keep coming back. A customer order is late again. A bill is corrected again. The same stock count mismatch appears again. Each time, someone fixes the symptom, and a few weeks later the problem returns.

This is the second article in our Lean for Jewellery Retail series. The A3 is a Lean habit for problems that deserve proper thought: write the problem, its causes and your plan on one page, and make that page the thing the team discusses.

What an A3 is

An A3 is a one-page, living document. It gets its name from the paper size it was traditionally written on. It has no fixed shape, but most A3s follow the same flow, left to right and top to bottom:

1. Background. Why this problem matters, in two or three lines.
2. Current situation. What happens today, with facts and a few simple numbers.
3. Goal. What ‘better’ looks like, and by when.
4. Root cause analysis. Why it keeps happening.
5. Countermeasures. What you will change, who does it, and by when.
6. Follow-up. How and when you will check whether it worked.

‘Living’ means you update it as you learn. It is pinned up, discussed in a short meeting and revised, not filed away after one meeting.

Why one page helps

A page forces choices. You cannot write ten causes and fifteen actions, so you have to decide what matters most. It also makes the thinking visible: a colleague can read the page in five minutes and say, ‘I do not think that is the real cause.’ That conversation is where the value is.

A worked example: late custom orders

This is an illustrative example, not a named client. The facts and numbers are placeholders to show how the page reads.

Background

A showroom takes custom orders for rings and bangles. Customers are promised a delivery date, and some orders arrive after it. Late orders upset customers and take the owner’s time on calls.

Current situation

For one month, the team lists every custom order, the promised date and the actual date. For example, they might find that of the orders taken, a good share were late, and the delay was mostly between ‘order sent to the workshop’ and ‘first piece returned for approval’. (Use your own count here. We have not given a figure because it depends on your business.)

Goal

‘Deliver custom orders on the promised date. Review after two months.’ A goal is best written as something you can count.

Root cause analysis

A simple method is ‘5 Whys’: ask why, then ask why again of each answer, until you reach something you can change. It might run like this:

• Why was the order late? The first piece came back from the workshop after the promised date.
• Why? The workshop started late, and it needed two clarifications.
• Why clarifications? The order details were given on the phone and some details were missing, such as finger size or finish.
• Why missing? There is no standard order form, so each salesperson writes what they remember.
• Why no form? It was never agreed who owns the order process.

Notice that the root cause is a missing standard and a missing owner. It is not ‘the workshop is slow’ or ‘staff are careless’. Good A3s usually end in a process cause, not a person.

Check each ‘why’ with facts. Look at three or four actual orders and see whether the pattern holds before you accept the cause.

Countermeasures

Follow-up

Count late orders again after four and eight weeks. Pin the A3 at the order desk and add notes: what worked, what did not. If the form still leaves gaps, add the missing question to the form and update the page.

A blank A3 you can copy

Draw a line down the middle of a sheet and fill these boxes, using short sentences and simple numbers:

• Left side: Background, current situation (with facts), goal, root causes.
• Right side: Countermeasures (action, owner, date), expected result, follow-up date, and what you learned.

Write it in pencil. It is meant to change.

Tips for a good A3

• Go and see. Look at the actual order forms, the actual bills or the actual vault, not only reports.
• Keep the words short. If a box needs a paragraph, you have not yet understood the problem.
• Involve the people who do the work. They often know the real cause already.
• Choose one problem per page. If you find a second problem, start a second A3.

Frequently Asked Questions

Next step

If you would like help applying Lean in your showroom, workshop or back office, book a consultation with APJ Advisory. We will look at how your business runs today and talk through practical options. You may also like our guides to written SOPs for jewellery and retail stores and policies and SOP designing.