Define a Multi - Level Bill of Materials (BOM) in Production

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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.

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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.

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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.

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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.

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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

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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.

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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.

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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.