How to Define a Multi - Level Bill of Materials (BOM) in Production?
In this tutorial, we will walk you through the complete process of defining multi-level Bills of Materials (BOM) in Logic ERP. Multi-level BOMs are essential when products require multiple internal production stages and semi-finished items need their own independent production. Let’s begin.
Accessing the Raw Material Specification Screen
Navigate to Items + Process → Raw Material Specs (Grid Mode).
Select the Item for which you want to define the BOM.
Click Refresh to load the existing Bill of Materials for that item.
Enabling Multi-Level BOM (Multi BOM)
To create multi-stage production structures:
Tick the Multi BOM checkbox.
If the option is not visible, go to Configuration and enable Multi BOM settings.
This feature is required when:
The finished product requires semi-finished components
Each semi-finished component has its own independent production process
Example:
If producing Item A requires manufacturing Item B and Item C, each with separate production stages, a multi-level BOM becomes necessary.
Defining Process-Wise BOM
To add BOM details for a specific production stage:
3.1 Select the Production Process
Choose the Process Name.
The related Process Group appears automatically.
3.2 Choose Relevant Raw Material
Select the Body Part.
Then select the Raw Material Item required for that process.
3.3 Size-Wise Material Consumption
In the Sizes column, define the quantity of raw material required for each size.
This ensures accurate and size-based consumption planning.
3.4 Costing Information
Plan Cost Per Unit: Estimated or standard raw material cost.
Actual Cost Per Unit and Actual Amount Used:
Recorded during production
Helps track real-time consumption and variance analysis.
After entering all details, click Save.
Understanding the Multi-Level BOM Tree Structure
The left panel displays the complete multi-level BOM hierarchy in a tree format.
It helps you:
Visualize production stages
Track semi-finished components
Understand material dependencies clearly
Adding Semi-Finished Components
If your product includes semi-finished items:
Define a separate BOM for each semi-finished component.
Link these components to the finished product’s master BOM.
Mandatory: Ensure Multi BOM is enabled for semi-finished items.
Without this option, the system will not generate separate job orders for semi-finished items in future production stages.
Useful Shortcut Keys
To speed up BOM creation, use the shortcuts shown at the bottom of the screen:
F2 – Update quantity for the selected region
Delete – Remove quantity from the selected region
F5 – Copy raw material details
F3 – Update quantity using an expression
F6 – Import raw material specifications from an external file
These shortcuts significantly enhance efficiency when managing large and complex BOMs.
Conclusion
By enabling Multi BOM and defining stage-wise raw materials, size-based consumption, and separate BOMs for semi-finished goods, you can build a precise and structured multi-level Bill of Materials. This ensures accurate production planning, cost control, and efficient job order generation within Logic ERP.
