8 Classic Supply Chain Models Explained: From JIT to DRP

Supply chain discussions are often filled with abbreviations like JIT, VMI, BTO, CPFR, which can feel like a foreign language. Behind these acronyms are four fundamental questions:

When does the goods arrive?

Where is the inventory stored?

Who pays first?

How long does the customer wait for the goods?

Below are the eight most common classic supply‑chain models, explained in plain language.

1. JIT – Just In Time: Keep Inventory Minimal

JIT (Just in Time) was popularized by Toyota. The idea is simple: raw materials arrive at the factory exactly when needed—no extra pieces, no early deliveries. Think of buying fresh vegetables daily instead of stockpiling them.

Benefits: Minimal warehouse space, reduced spoilage.

Drawbacks: Vulnerable to supply disruptions (e.g., market closed due to rain).

JIT offers very low inventory cost and capital usage but requires highly responsive and reliable suppliers. It works best in mature supply chains with tight upstream‑downstream coordination.

2. VMI – Vendor Managed Inventory: Supplier Holds Stock at Customer Site

VMI (Vendor Managed Inventory) means the supplier monitors and replenishes inventory stored in the customer’s warehouse. It’s like a water‑delivery service that refills your tank when it gets low.

Customers enjoy hassle‑free, continuous supply.

Suppliers bear the inventory and capital risk.

Retail giant Walmart uses VMI to shift inventory responsibility to suppliers, allowing Walmart to operate with lighter inventory.

3. BTO – Build To Order: Produce Only After Receiving an Order

BTO (Build to Order) follows a straightforward rule: produce only after a customer places an order. Dell computers are a classic example—customers configure a PC online, and Dell assembles it after the order is received.

Advantages: No inventory buildup, highly customized products.

Disadvantages: Longer delivery lead times; customers cannot receive the product instantly.

This model suits high‑value, highly customizable industries such as machinery and custom furniture.

4. BTS – Build To Stock: Produce First, Store Inventory

BTS (Build to Stock) is the opposite of BTO: products are manufactured in advance, stocked in warehouses, and shipped when customers order. Think of buying a soda at a supermarket—you don’t wait for the factory to produce it.

Pros: Fast delivery, high customer satisfaction.

Cons: Risk of excess inventory if demand falls short.

BTS is ideal for fast‑moving consumer goods where immediate availability is critical.

5. Demand‑Driven Production / Procurement (Sales‑Driven Production)

These two approaches are common in e‑commerce. “Sales‑driven production” means producing based on actual market sales; “sales‑driven procurement” means purchasing raw materials only after receiving orders.

For example, fashion e‑stores may launch a new style, then scale up production only if sales are strong, avoiding excess stock.

The downside is the need for rapid response across the supply chain; otherwise, popular items may run out of stock.

6. CPFR – Collaborative Planning, Forecasting and Replenishment

CPFR (Collaborative Planning, Forecasting and Replenishment) brings suppliers and customers together to jointly forecast demand, plan production, and schedule replenishment. It’s like roommates coordinating grocery shopping.

Reduces forecast errors and stockouts.

Requires high data sharing and trust.

Retailers such as Walmart and consumer‑goods giants like Procter & Gamble use CPFR to avoid both stockouts and overstock.

7. JIS – Just In Sequence: Keep Order of Delivery Correct

JIS (Just in Sequence) extends JIT by adding the requirement that deliveries arrive in the exact sequence needed for assembly. In automotive production, parts for red, white, and black cars must be supplied in the correct order; otherwise, the line stops.

Higher difficulty than JIT, but yields greater efficiency.

JIS demands precise coordination but can significantly improve line throughput.

8. DRP – Distribution Requirements Planning

DRP (Distribution Requirements Planning) is used by distribution‑focused companies (beverages, food, daily‑use products). It focuses on multi‑warehouse, multi‑channel inventory distribution rather than factory production.

For instance, a beverage company with ten regional warehouses uses DRP to automatically calculate how much stock each warehouse needs and when to replenish.

Benefits: Reduces stockouts and excess inventory.

Drawbacks: Requires sophisticated systems and high‑quality data.

Conclusion – Balancing Inventory, Capital, and Delivery Speed

The eight models are not rigid labels but tools to balance inventory, capital, and delivery speed. Choose JIT or BTO to cut inventory, BTS or JIS for fast delivery, VMI or CPFR for collaborative optimization, demand‑driven production for market responsiveness, and DRP for efficient distribution networks. Understanding each abbreviation helps you select the most suitable strategy for your business.

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