⚙️ How good people can miss... so good factories are "designed not to miss" in the first place.

Imagine that in the production line, there is a piece that can be inverted.

We can solve the problem in two ways.

❌ First way: Label it "Be careful! Don't put it in reverse" and train all employees to remember.

✅ Second way: redesign the Fixture. If placed on the wrong side, the workpiece will not fit at all.

If you can choose, I choose the second method. 😆

This is the concept of Poka-Yoke (former) or Mistake Proofing.

🧠 Poka-Yoke's heart is not "making people more careful."

But is...

This makes the process less dependent on people's memory and caution.

Because in real life, even with a very experienced Operator, there are days of tiredness, haste, interruption, or multiple tasks at once.

If the process allows for mistakes, mistakes are likely.

So instead of asking,

"Who's doing it wrong?"

Try turning it into

"Why does our Process allow this offense to happen?"

The question changed a little, but the solution changed.

The best Poka-Yoke 🟢 is "can't do it wrong."

A very simple example is a plug or Connector that designs the shape to be plugged in only one direction.

In factories, the same principles apply, such as

🔩 Fixture that only gets the correct Orientation workpiece.

🧴 The model non-straight lid cannot be assembled into the product.

⚖️ The scales do not allow passage if the weight is outside the Specification.

We call this approach Control / Prevention Type.

Meaning not waiting for the wrongdoer to be found later

🔵, but some processes can't prevent 100%, it's "quick to check."

For example, the Sensor checks if there is a lid.

Label Monitor Vision Camera

Barcode Scanner checks if the raw material about to be used matches Product Recipe.

Missing Component Check Scale from Weight

This is another Poka-Yoke approach, Detection.

The fault may have happened, but we detected it at the point of birth before it continued through several processes.

Because the further the Defect travels...

💰 The subsequent costs are often even higher.

🏭 My favorite example in the food factory.

Let's say we have 2 SKU similar looking products, but use different labels.

One way is to write SOP as

"Before production starts, please check the labels correctly."

Can do but still rely on very tall people

Try adding Barcode Interlock instead.

Operator Scan Product Order → Scan Label → Code Comparison System

If it doesn't match...

🚨 The machine doesn't allow Start.

From the original to

"Must remember correctly."

Become

"The system helps check it right."

This is the Mistake Proofing concept.

🎯, where do you find a chance to make Poka-Yoke?

You don't have to start with the big project.

Try to move forward and find an event where people say...

"Be careful here."

"This one, don't forget."

"Have to look carefully or be misplaced."

"New employees often make mistakes here."

These sentences are very interesting Candidates for Poka-Yoke. 😆

And then asked

Can we design it wrong, or at least detect it immediately?

Sometimes the answer may not be automation, cost millions.

But maybe just Pin, Guide, Sensor, Color, Shape, Barcode or a small Fixture for a few baht.

Because in the end, good Quality is not caused by having the best Inspector.

But it's caused by a process that's hard to create the wrong thing in the first place.

This is the charm of Poka-Yoke, sir. - Protect today. Better by solving tomorrow's waste. ⚙️✨

# Champion's record # PokaYoke # Factory knowledge # OperationalExcellence