# How to Build a Supply Chain Management System in Bubble

- Tool: Bubble
- Difficulty: Beginner
- Time required: 35-45 min
- Compatibility: All Bubble plans (paid plan for backend workflows)
- Last updated: March 2026

## TL;DR

A supply chain management system in Bubble tracks products from suppliers through inventory to customers. This tutorial covers building the data model for products, suppliers, purchase orders, and inventory levels, creating management dashboards for each stage of the supply chain, automating low-stock alerts with backend workflows, and generating purchase orders when inventory drops below minimum thresholds.

## Overview: Supply Chain Management in Bubble

This tutorial guides you through building a supply chain management system that tracks products, manages suppliers, monitors inventory levels, and automates reordering. The system gives you full visibility into your supply chain from a single dashboard.

## Before you start

- A Bubble app on any plan (paid for backend workflows)
- Basic understanding of Bubble Data Types and Workflows
- Familiarity with Repeating Groups and conditional formatting
- Understanding of basic inventory management concepts

## Step-by-step guide

### 1. Design the supply chain data model

Go to the Data tab and create these Data Types. 'Supplier' with fields: name (text), contact_email (text), phone (text), address (text), lead_time_days (number). 'Product' with fields: name (text), sku (text), category (text), supplier (Supplier), unit_cost (number), selling_price (number), current_stock (number), minimum_stock (number), reorder_quantity (number). 'PurchaseOrder' with fields: supplier (Supplier), status (text — draft/sent/received/cancelled), total_amount (number), order_date (date), expected_delivery (date). 'PurchaseOrderItem' with fields: purchase_order (PurchaseOrder), product (Product), quantity (number), unit_cost (number).

**Expected result:** Four Data Types create a complete supply chain data model with proper relationships.

### 2. Build the inventory dashboard

Create an inventory page with a Repeating Group showing all Products. Display columns for SKU, name, category, current stock, minimum stock, supplier name, and unit cost. Add conditional formatting: when current_stock is less than minimum_stock, show the stock cell in red with a warning icon. Add filter controls above the table: a Dropdown for category, a Search Input for product name, and a checkbox to show only low-stock items. Add summary cards at the top showing total products, total inventory value (sum of current_stock times unit_cost), and count of low-stock items.

**Expected result:** A dashboard displays all products with visual indicators for low stock and summary metrics at the top.

### 3. Create the purchase order workflow

Build a 'Create Purchase Order' page. Add a Dropdown to select a Supplier. Below it, add a Repeating Group showing all Products for the selected supplier. Each row has the product name, current stock, and an Input for the order quantity. Add a 'Create Order' button. The workflow creates a new PurchaseOrder with the selected supplier, status = 'draft', and order_date = Current date/time. Then for each product with a quantity entered, create a PurchaseOrderItem linked to the PurchaseOrder. Calculate and set total_amount on the PurchaseOrder. Add buttons to change PO status: Send (status = sent), Receive (status = received, which triggers inventory updates).

**Expected result:** Users can create, send, and receive purchase orders with automatic inventory updates on receipt.

### 4. Automate stock receiving and inventory updates

When a purchase order status changes to 'received', create a workflow that updates inventory. Search for all PurchaseOrderItems where purchase_order = this PO. For each item, Make changes to the Product: add the ordered quantity to current_stock. Use Schedule API Workflow on a List to process each item in a backend workflow. This ensures all stock levels are updated accurately. Also set the PurchaseOrder's received_date to Current date/time for tracking.

> Pro tip: Use Result of Step X to reference the PurchaseOrder created in the previous step rather than searching for it, ensuring you update the correct record.

**Expected result:** Receiving a purchase order automatically increases product stock levels by the ordered quantities.

### 5. Set up automated low-stock alerts

Create a scheduled backend workflow called 'check_low_stock' that runs daily. Search for Products where current_stock is less than or equal to minimum_stock. For each low-stock product, check if a draft or sent PurchaseOrder already exists for that supplier. If not, create a notification for the inventory manager and optionally auto-generate a draft PurchaseOrder with the product's reorder_quantity. Send an email summary of all low-stock items to the admin. This proactive alerting prevents stockouts.

**Expected result:** The system automatically checks stock levels daily and alerts administrators about products that need reordering.

## Complete code example

File: `Workflow summary`

```text
SUPPLY CHAIN MANAGEMENT SUMMARY
=====================================

DATA MODEL:
  Supplier: name, email, phone, address, lead_time
  Product: name, sku, category, supplier, unit_cost,
    selling_price, current_stock, min_stock, reorder_qty
  PurchaseOrder: supplier, status, total, dates
  PurchaseOrderItem: PO, product, quantity, unit_cost

INVENTORY DASHBOARD:
  Summary cards: total products, inventory value,
    low-stock count
  RG: Products with filters (category, search, low-stock)
  Red highlighting: current_stock < minimum_stock

PURCHASE ORDER FLOW:
  1. Select supplier → Show their products
  2. Enter quantities for each product
  3. Create PO (status: draft)
  4. Create PO Items for each product
  5. Calculate total_amount
  6. Send PO (status: sent)
  7. Receive PO (status: received)
     → Update each product's current_stock

RECEIVING WORKFLOW:
  When PO status → received:
    For each PurchaseOrderItem:
      Product's current_stock + item quantity
    Set received_date = Current date/time

AUTOMATED ALERTS:
  Schedule: daily check_low_stock
  Search: Products where stock <= minimum
  For each low-stock product:
    If no existing PO for supplier:
      Create draft PO with reorder_qty
      Notify inventory manager
  Send daily email summary of low-stock items
```

## Common mistakes

- **Updating inventory directly without going through purchase orders** — Direct stock edits bypass the audit trail, making it impossible to trace where inventory came from Fix: Always update stock through purchase order receiving workflows to maintain a complete record of inventory changes
- **Not setting minimum stock levels on products** — Without minimum thresholds, the automated alerting system has nothing to compare against and cannot warn you about low stock Fix: Set a minimum_stock value on every product based on lead time and typical consumption rate
- **Creating alerts for every product on every check without deduplication** — If stock stays low for multiple days, you get duplicate alerts daily until the product is restocked Fix: Check for existing open alerts or draft purchase orders before creating new ones

## Best practices

- Set minimum stock levels based on supplier lead times and sales velocity
- Use purchase orders for all inventory changes to maintain an audit trail
- Run daily stock checks to catch low inventory before stockouts
- Color-code stock levels for instant visual identification of problems
- Track supplier lead times to calculate expected delivery dates
- Paginate product lists and add filters for efficient inventory browsing
- Archive old purchase orders rather than deleting them for historical analysis

## Frequently asked questions

### Can Bubble handle a large product inventory?

Bubble works well for inventories up to 30,000-50,000 products with proper optimization. Use pagination, constraints, and pre-computed fields to maintain performance at scale.

### How do I track inventory across multiple warehouses?

Add a 'Warehouse' Data Type and a 'WarehouseStock' junction table linking products to warehouses with quantity fields. This allows per-warehouse inventory tracking.

### Can I integrate with barcode scanners?

Yes. Use a barcode scanner plugin or a camera-based barcode reader. The scanned value can look up products by SKU and update stock levels.

### How do I handle returns and stock adjustments?

Create a 'StockAdjustment' Data Type to record any non-PO stock changes with a reason field. This maintains the audit trail while allowing manual corrections.

### Can I connect this to my existing accounting software?

Yes. Use the API Connector to sync purchase orders and inventory data with QuickBooks, Xero, or other accounting tools via their APIs.

### Can RapidDev help build a supply chain system?

Yes. RapidDev can build complete supply chain management systems in Bubble including multi-warehouse support, automated reordering, supplier portals, and reporting dashboards.

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Source: https://www.rapidevelopers.com/bubble-tutorial/create-a-supply-chain-management-system-in-bubble
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