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Spot low inventory and draft supplier purchase orders

Last updated

DifficultyMedium
SetupNo-code
Best forOperations
ToolsShopify or WooCommerce, Cin7, inFlow Inventory, NetSuite, QuickBooks Online, Make or n8n + an LLM
The problem

Small retailers, ecommerce brands, and operations teams often discover an item is running out only when stock hits zero or a customer order cannot be fulfilled. Checking reorder points across hundreds of SKUs, factoring in supplier lead times and minimum order quantities, and writing purchase orders by hand gets pushed off until it becomes a rush order.

How the agent works

Each morning the agent reads current available inventory, open purchase orders already in transit, recent sales velocity, and your supplier table (lead time in days, unit cost, minimum order quantity, case pack size). It flags SKUs whose days of cover have dropped below the supplier's lead time plus your safety buffer, calculates a suggested reorder quantity rounded to case packs and MOQs, and groups items by supplier. It then creates a draft purchase order in your inventory or accounting tool (or a review sheet) and drafts the supplier email for a buyer to check and send.

Setup steps
  1. Build a clean supplier and SKU table: preferred supplier, lead time in days, safety stock days, minimum order quantity, case pack size, and unit cost
  2. Connect read-only access to daily inventory levels, recent sales history, and already-open purchase orders so in-transit stock is not ordered twice
  3. Have the agent calculate days of stock remaining per SKU and flag items at or below their reorder point
  4. Group flagged SKUs by supplier and check whether the combined order meets the supplier's minimum order quantity or free-freight threshold
  5. Create draft purchase orders and draft supplier emails in a review queue, noting the sales window and assumptions used
  6. Have the buyer or operations owner check seasonal spikes, upcoming promotions, and cash flow before approving and sending any purchase order
Tools that can do this
  • Shopify or WooCommerce
  • Cin7
  • inFlow Inventory
  • NetSuite
  • QuickBooks Online
  • Make or n8n + an LLM

Not ranked. Tools marked Featured pay for a highlighted listing; that never decides which tools we include. Check each vendor's current features and pricing.

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Human in the loop

A buyer, founder, or operations manager reviews and approves every purchase order and sends every supplier email. The agent never commits company funds or places a supplier order on its own.

Risks and guardrails

One-off bulk orders, viral spikes, or stale inventory counts can trick a formula into over-ordering slow stock, so always show the trailing sales numbers alongside the suggestion and keep a human on approval. Make sure open purchase orders are subtracted from the reorder calculation so the agent does not recommend ordering the same replenishment twice.

ROI notes

Track stockout incidents on core SKUs, rush shipping fees from late orders, and hours spent each week checking stock sheets and typing purchase orders.

Also useful: reconcile physical stock counts against your system; match supplier invoices to purchase orders and receipts; enrich new product listings from supplier data.

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