Notes from the Field

Last-mile delivery is the biggest variable cost on most orders. Here's how the three national carriers price it in 2026 — carrier personalities, dimensional weight, the surcharge stack, a head-to-head accessorial table — and why you almost never pay the published rate.

A $60 product with a $20 cost-to-land shows 67% margin at first glance. After accounting for every real cost — and mapping when each one actually hits versus when revenue arrives — the picture looks very different.

Most sellers get their first real customer feedback as a one-star review. Pre-launch market testing lets you collect VOC privately — before inventory is committed and before your brand rating is on the line.

Ask any Amazon employee what the company's culture is, and you'll hear the same answer immediately. But the culture that actually built Amazon — the LP cards, the Bar Raiser veto, and what survival looks like — is both more specific and more human than the legend.

From the moment an order is placed to the moment a package leaves the building — a step-by-step walkthrough of stow, pick, pack, SLAM, sortation, and last-mile dispatch.

As US manufacturing policy shifts, more small brands are asking whether to source domestically or even make their products locally. The answer is rarely binary — and the options in between are often the most practical path forward.

Amazon, eBay, Walmart, Etsy, Newegg, Wayfair, Temu, TikTok Shop, and Shopify — compared at entry level and at scale. Two fee tables, same nine platforms, no mixed-level comparisons.

Amazon's network is a marvel of algorithmic precision — until a blizzard shuts down New York. A first-person account of the night the entire East Coast fulfillment network cascaded, one button press at a time.

For most FBA sellers, inbound is a black box. Understanding Amazon's six receiving paths — Case Receive, Each Receive, Prep, Problem Solve, Sideline, and Discard — explains why some shipments fly through and others disappear.

An interactive breakeven simulator showing how sell-through rate determines profitability.

Amazon operates 150+ fulfillment centers in the US. But size isn't the story — it's how each facility type fits into a precisely orchestrated network that decides where your inventory goes before you've even shipped it.

The stated 5.9% GRI understates the real impact — a zone-by-zone surcharge analysis.

In 2015, Amazon quietly announced it would stop being a customer of logistics companies and start becoming one. What happened next redefined what a supply chain could look like.

Amazon holds ~40% of US online retail — but the storefront is only what you see. This post opens a seven-part insider series on the supply chain infrastructure that makes it genuinely irreplaceable.

A data-driven analysis of US warehouse placement using shipment heatmaps.

The 7–10x factory-to-retail rule explained, with an interactive cost stack.

Before you can optimize a supply chain, you need to be able to trust the data it runs on.

Amazon pulled its Google Shopping ads across eight markets and changed how buyer feedback works — on the same week. Neither change is a crisis for a well-run operation. Here is what each policy actually means.

Inconsistent SKU data, mismatched barcodes, and ASN errors are systematic cost drivers hiding in plain sight.

The OBBBA was signed July 4, 2025. Four business-side provisions — bonus depreciation, §179, R&D expensing, and the interest limitation — directly affect how product-based businesses plan capital expenditure and manage tax costs.

Measurement is not a step at the end of the 5M framework — it is the discipline that runs through all of it.

How system integration, packaging method, and box assortment combine to determine per-order fulfillment cost.

A practical guide to the current tariff landscape and the options available to brands sourcing from Asia.

A practical breakdown of tariff engineering strategies available to importers operating under current US trade rules.

An introduction to Three Flows Solutions — what we do, and why we believe education and entrepreneurship belong together.