> For the complete documentation index, see [llms.txt](https://kb.logicerp.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://kb.logicerp.com/logic-erp-learning-hub-tutorials-and-best-practices/production/production-vouchers/job-order/job-order-configuration/additional-lot-expression.md).
# Additional Lot Expression
**YouTube:** [How to Configure Additional Lot Number Expressions in Job Orders?](https://youtu.be/W9lH9roTyUs)
## How to Configure Additional Lot Number Expressions in Job Orders?
In this tutorial, we will learn how to automatically generate an **Additional Lot Number** in a Job Order using the **Additional Lot Expression** feature in Logic ERP. This feature allows you to create dynamic lot numbers based on predefined expressions, ensuring consistency and eliminating manual entry.
***
### Objective of This Feature
* Automatically generate Additional Lot Numbers.
* Eliminate manual lot number entry.
* Maintain consistent lot numbering.
* Create dynamic lot numbers using predefined expressions.
* Improve accuracy and efficiency during Job Order creation.
***
### Access to the Job Order Configuration
* Open the **Job Order Configuration** window.
* Navigate to the **Other Settings** section.
* Locate the option labeled as:
> **"Additional Lot Expression"**
* Click on the option.
* Define the required expression using the available fields and functions.
* Save the configuration.
***
### Create a New Job Order
* Initiate a **New Job Order** entry.
* The system automatically generates the **Additional Lot Number** based on the configured expression.
**Example**
Suppose the configured expression uses the **Job Order Number** as the source value.
* **Job Order Number:** JO - 2
**Result**
* The **Additional Lot Number** is automatically populated as: **JO2**
The generated value reflects the expression configured in the **Additional Lot Expression** setting.
***
### Key Benefits
* Eliminates manual lot number entry.
* Ensures standardized lot numbering.
* Reduces data entry errors.
* Automatically generates dynamic lot numbers.
* Improves consistency across Job Order transactions.
***
### Best Practice Tips
* Configure expressions based on your business naming conventions.
* Use available fields and functions to create meaningful lot numbers.
* Review the generated Additional Lot Number before saving the Job Order.
* Update the expression whenever your lot numbering format changes.
***
### Final Outcome
After configuring the **Additional Lot Expression**, Logic ERP automatically generates the **Additional Lot Number** during Job Order entry based on the defined expression. This streamlines the Job Order process, reduces manual effort, and ensures consistent and accurate lot numbering.
---
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