When you listen in on conversations at a manufacturing site, you'll often hear phrases like these:
"Cut a slip for this."
"The slip hasn't been cut yet."
"Let's process it after cutting the slip first."
This article explains what "cutting a slip" means in manufacturing, for engineers and people who are new to the industry.
"Cutting a Slip" Means Recording a Transaction or Movement of Goods
Put simply, "cutting a slip" means
recording an event that occurred in the course of business as a formal voucher (i.e., logging the transaction that took place).
For example, the following kinds of events happen every day in manufacturing:
- Materials were received
- Materials were issued from the warehouse to the production floor
- 100 units of product were made
- Product was moved to a different warehouse
- Product was shipped to a customer
- Defective product was scrapped
In the real world, things are physically moving around.
But simply moving physical goods doesn't change the inventory figures in the system.
So that event needs to be recorded as a slip.
For example, suppose the warehouse has 1,000 kg of Material A.
200 kg was issued to the production floor.
In the real world, the warehouse now has 800 kg of material.
But if nothing is entered into the system, the system will still show 1,000 kg.
So you cut a slip stating "200 kg of Material A was issued."
Then, in the system too,
1,000kg − 200kg = 800kg
is what you get.
In other words, a slip can also be described as a record that reflects, within the system, business activity that occurred in the real world.
From an Engineering Perspective, It's Close to "Registering an Event"
If you're an engineer, it might be easier to understand through the concept of an "event."
For example, there's one approach where you
simply record the outcome: "Inventory of Product A went from 100 units to 90 units."
在庫数 = 90
On the other hand, there's also an approach where you record the event itself:
"10 units of Product A were shipped."
出荷
商品: A
数量: 10
日時: 2026-07-10
Recording the business event "10 units of Product A were shipped" is something close to what a slip actually is.
A slip records information such as:
- when
- what
- from where
- to where
- how much
- why
- who processed it
Based on this slip, inventory, sales, production records, and so on are then updated.
So from an engineering standpoint, it's easiest to understand it as:
Cutting a slip = Registering a business event in the system
.
Why Not Just Update the Inventory Count Directly?
This raises one natural question.
"If inventory decreased, why not just change the inventory count directly to 800 kg?"
Technically, that's certainly possible.
But doing that would leave you unable to tell
why it went from 1,000 kg to 800 kg
.
Maybe 200 kg was used in production.
Maybe it was shipped to a customer.
Maybe it was moved to a different warehouse.
It might even have been scrapped as defective.
Or someone might simply have entered the wrong number.
If you only ever overwrite the inventory count, you lose the ability to trace the reason behind the change.
That's why records are kept like this:
7月1日 入荷 +500kg
7月2日 払出 -200kg
7月3日 返品 +50kg
7月4日 廃棄 -10kg
Each individual event is recorded as a separate slip.
By accumulating these records, you can calculate the current inventory.
This is close to what, in database design, is called the approach of preserving history or transactions.
Manufacturing Has All Kinds of Slips
There isn't just one single type of "slip."
Names vary by company and by system, but examples include the following types of slips:
- Receiving slip
- Warehousing-in slip
- Warehousing-out slip
- Issue slip
- Transfer slip
- Production-record slip
- Shipping slip
- Sales slip
- Return slip
- Scrap slip
Each records a different type of business event.
For example, a "transfer slip" would record information like:
商品: 製品A
移動元: 岡山倉庫
移動先: 東京倉庫
数量: 100個
By cutting this slip,
岡山倉庫 -100個
東京倉庫 +100個
this movement of inventory takes place.
The company's total inventory count doesn't change.
But the location of the inventory changes.
In this way, the processing that occurs in the system differs depending on "which slip is cut."
"Cutting a Slip" and "Printing Paper" Aren't Necessarily the Same Thing
Because of the word "slip," a lot of people probably picture a physical piece of paper.
And in fact, paper slips used to be at the core of manufacturing operations in the past.
These days, however, there are also cases handled entirely within the system.
For example, entering the following on screen,
商品: A
数量: 100
出庫先: 製造1課
and pressing the "Register" button.
Even with just this, people on the shop floor may still describe it as:
"cutting a warehousing-out slip"
.
In other words, "cutting a slip" doesn't necessarily mean printing a physical piece of paper.
What matters is causing a business event to occur as a formal, official record.
Why Do People Say "Cut" a Slip?
The expression "cut" is said to originate from business terminology dating back to when paper slips were in use.
It's thought to come from the act of tearing a slip off from a pad or booklet when it was issued.
Because of this,
"issue a slip"
"publish a slip"
"register a slip"
"cut a slip"
these expressions are sometimes used with similar meanings.
However, the exact nuance can vary subtly by company.
For example, "cutting a slip" might refer to:
- registering it in the system
- assigning a slip number
- finalizing the slip
- printing the paper
and exactly which of these moments it points to depends on the business context.
If you're doing requirements-gathering for a system development project, it's important to confirm:
"Specifically, what operation being complete counts as 'cutting the slip'?"
.
In System Development, Don't Take the Word "Slip" at Face Value
In manufacturing system development, the word "slip" comes up constantly.
But it's risky to simply think, "I just need to build a slip table."
What matters is which business event that slip represents.
For example, in the case of a warehousing-out slip,
出庫が発生する
↓
出庫伝票を登録する
↓
在庫が減る
↓
在庫履歴が記録される
this business flow exists.
Beyond that, there are also rules such as:
- Can it be corrected after being registered?
- Who approves it?
- Can it be canceled?
- If canceled, does inventory get restored?
- Can a slip from a past date be registered?
A slip is not simply an input form.
It's a mechanism for managing a business event, along with the state changes that event causes.
Summary
In manufacturing, "cutting a slip" means:
leaving behind, as a formal record, an event that occurred in the course of work
.
Materials came in.
Materials were used.
Product was made.
Product was moved.
Product was shipped.
In manufacturing, many things are happening and moving around every single day.
Slips exist to record each and every one of those individual movements.
So it's easiest to think of it as:
A slip = a record of a business activity or a movement of goods
Cutting a slip = formally recording that event
.
If you're new to manufacturing and come across the phrase "cutting a slip," try asking yourself first:
"What event is this slip recording?"
.
Once you understand what a slip really means, the flow of work in manufacturing will start to become a little clearer too.