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📦 Inventory Management Extension

Inventory Management Extension is an ERPNext add-on that improves inventory traceability using barcodes. It streamlines barcode handling during purchasing, manufacturing, and sales, enabling users to track individual packages or splits from batches all the way through delivery.

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🧩 Key Features

• Barcode generation for incoming and manufactured stock.

• Support for quantity splits, generating multiple barcodes from a single batch.

• Barcode tracking across all stages: Purchase, Manufacturing, Sales.

• Easy barcode printing per line item.

• Enhanced Pick List process with barcode selection and scanning.

• Batch-based delivery verification.

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🔍 Workflow Overview

1. Purchase Transactions (Purchase Receipt / Purchase Invoice)

• A new field called transactional_barcode_tracker is added to the child item table.

• Barcodes are automatically generated before saving using the EAN format.

• Split Functionality:

  • Enter a value in the split custom field (e.g., 20).

  • This creates 20 line items and splits the quantity evenly across them.

• A Print button is available per line item:

  • When you change the quantity, a transaction barcode is generated (if unsaved).

  • You can print the barcode and physically attach it to the package.

📄 On Submission:

• Barcode records are saved into a new doctype: Batch Barcode Tracker, which contains:

  • Batch Number

  • Barcode Image

  • Quantity

  • Warehouse

  • Item Code

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2. Manufacturing (Stock Entry: Repack / Manufacture / Material Receipt)

• For Repack and Manufacture:

  • Source items are listed as usual.

  • Target warehouse items (finished goods) trigger barcode creation.

• For Material Receipts:

  • Any item line with a batch will also trigger transaction barcode creation.

On submission, each target item line results in a record in Batch Barcode Tracker.

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3. Sales Workflow

Sales Order → Pick List → Delivery Note → Sales Invoice

• Customer orders specific batch items. Use creates sales order.

• Pick List is not automatically generated.

• User creates Pick List manually from Sales Order.

Pick List Extension

• A custom child table Pick List Extension is introduced.

  • It mirrors Pick List Items but includes an extra barcode field.

• The user selects a warehouse (manual or automatic).

• The barcode field is filtered to show:

  • Barcodes from Batch Barcode Tracker

  • Belonging to the selected batch

  • Not already used in another line

Barcode Handling:

• Scanning supported via the scan_transactional_barcodes field.

  • When a barcode is scanned:

    • A new line is added with the related item, warehouse, and batch.

• When saved:

  • Pick List groups by batch and totals quantities accordingly.

  • Barcodes can be printed for dispatch or logistics visibility.

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4. Delivery Note and Sales Invoice

• Upon submitting the Delivery Note:

  • Barcodes in Batch Barcode Tracker are marked as Sold = Yes.

  • ERPNext also handles batch consumption as per standard rules.

• Sales Invoice is created and submitted using the standard ERPNext process.

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📄 Summary of New/Extended Doctypes and Fields

Doctype	Field / Extension	Description
Purchase Receipt / Invoice	transactional_barcode_tracker	Tracks barcodes per line item
Purchase Receipt / Invoice	split	Splits quantity into multiple line items and generates barcodes
Purchase Receipt / Invoice	Line Item Print Button	Allows barcode printing per line item
Batch Barcode Tracker (New)	batch, barcode_image, qty, warehouse, item, sold	Tracks each barcode against its batch, item, and warehouse
Stock Entry	Repack / Manufacture Logic	Generates barcodes for finished goods in target warehouse
Pick List	Pick List Extension (child table)	Mirrors item lines but includes barcodes
Pick List	scan_transactional_barcodes	Field to scan barcodes directly into the pick list
Delivery Note	–	Submits and marks barcodes as sold
Sales Invoice	–	Follows ERPNext standard flow

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Barcode Printing

Barcodes printed include:

• Item Code and Name

• Quantity

• Barcode Image

• Batch Number.

Print options are available:

• Per line item in Purchase Receipt / Invoice

• In Pick List (for dispatch purposes)

• Batch Barcodes TRansaction

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🚚 Logistics Support

• Barcodes provide clear identifiers for packaged items.

• Assists warehouse and delivery teams in picking, verifying, and transporting items efficiently.

• Helps prevent errors in dispatch and improves inventory visibility.

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✅ Benefits

• Simplifies inventory tracking using barcodes.

• Enhances traceability from manufacturing to customer delivery.

• Reduces manual errors in stock handling.

• Supports unit-level packaging and logistics workflows.

• Integrates tightly with ERPNext’s standard batch and stock systems.