Supply Chain and Logistics Fundamentals for Physical Products
The sourcing, freight, and inventory decisions that determine whether a physical-product business can actually deliver — and the mistakes that trap cash or stock out on launch day.
The Physical Product Supply Chain, End to End
For most physical products, the chain looks roughly like: raw materials or components → manufacturing → quality inspection → freight from factory to your country → customs clearance → domestic warehousing → fulfillment to the customer. A delay or failure at any link pushes out everything after it — which is why experienced operators build in buffer time rather than planning to the day.
Ocean vs. Air Freight
| Ocean freight | Air freight | |
|---|---|---|
| Cost | Much cheaper per unit at volume | Much more expensive per unit |
| Speed | Weeks (often 3-6+ depending on origin) | Days |
| Best for | Planned inventory, bulk restocking | Urgent gaps, samples, high-value/low-weight items |
| Minimum practical volume | Usually needs a full or partial container | No real minimum |
Most physical-product businesses use ocean freight for planned inventory and reserve air freight for emergencies — an out-of-stock situation caused by ocean-freight timing is expensive to fix by air, but far more expensive to fix by running out of stock for weeks.
Incoterms, Briefly
Incoterms define exactly where responsibility — and cost — for the shipment transfers from seller to buyer. Two you'll encounter most often as a founder:
Key Terms
- FOB (Free on Board)
- The seller's responsibility ends once goods are loaded onto the ship at the origin port. You own the shipment — including freight cost and risk — from that point forward.
- DDP (Delivered Duty Paid)
- The seller handles everything, including freight and customs duties, delivering to your door. Simpler for you, but usually priced higher and gives less visibility into actual freight and duty costs.
Neither is universally better. FOB gives you more control and often a lower total cost if you can manage the logistics; DDP trades some cost and control for simplicity — which can be worth it for a first shipment while you're still learning the process.
Lead Time and Safety Stock
Total lead time is manufacturing time plus freight time plus customs time plus your own receiving/processing time — not just the manufacturing quote's stated lead time. Founders who plan only around the manufacturing lead time are consistently surprised by how much later inventory actually arrives.
Safety stock isn't overcautious
Safety stock is inventory held as a buffer against demand or supply variability. Given how long lead times can stack up for imported physical products, holding some safety stock is standard practice — running out of stock is often more expensive, in lost sales and search ranking, than the cash cost of holding a bit more inventory than you strictly need.
Common First-Time Mistakes
Mistakes that catch first-time importers most often
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Design for Manufacturing (DFM) Basics
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Importing, Tariffs, and Customs Basics for Physical Products
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