Journal

Notes on decision-making in physical networks.

Essays from the Quincus team on stochastic optimization, pricing, network design, and the engineering of systems that run live networks.

Pricing & rates

Air cargo rate management is still run on the last email in the thread

Air freight rates move faster than the systems meant to hold them, so teams fall back on the inbox. What that costs in margin, and the structure that fixes it.

Why rate cards fail in multimodal freight

A rate card prices legs. Multimodal freight is decided in journeys, where the legs interact and the card goes silent. On pricing the decision, not the lane.

Aug 1, 20264 min read

Network design

Intermodal versus multimodal logistics

Intermodal versus multimodal: the difference is contractual, not physical. Who absorbs transshipment risk, and how to optimize the choice per lane.

Aug 1, 20265 min read

Sovereign networks

Rerouting the world: chokepoints, disruption, and adaptive networks

One closed strait can reprice a continent. How to measure chokepoint exposure and design a network that reroutes instead of stalling.

Jul 21, 20265 min read

Sovereign networks

Sovereign supply networks: why nations are becoming operators

Supply chains are strategic infrastructure. What sovereign capability over food, fuel, and medical logistics requires beyond a policy document.

Jul 7, 20265 min read

Sovereign networks

Food security corridors and the logistics of resilience

Food security depends on corridor capacity, not just harvest volume. How to find the constraint in an agricultural logistics corridor and relieve it.

Jun 30, 20265 min read

Agriculture

Perishable networks: agriculture and the value of hours

For perishable freight, an hour has a price. How freshness decay curves turn transit time into a number you can optimize against.

Jun 16, 20264 min read

Healthcare logistics

Healthcare logistics: service levels where failure is not an option

In healthcare logistics, each additional nine of reliability costs more than the last. How to decide which lanes deserve which service level.

Jun 9, 20264 min read

Healthcare logistics

Cold chain logistics: optimizing for time, temperature, and truth

Cold chain risk is cumulative exposure, not a single breach. How to model excursion risk so shipments are protected where it actually matters.

Jun 2, 20264 min read

Freight forwarding

Freight forwarding margins: where optimization pays first

Freight forwarding margin is decided at quote time and lost in execution. Where the leaks sit and what freight forwarding software has to catch.

May 26, 20264 min read

Perspective

Why supply chain AI fails in production

Most supply chain AI dies between pilot and production. The integration, data, and accountability gaps that kill deployments, and how to close them.

May 19, 20265 min read

Engineering

Agentic AI in logistics: autonomy with guardrails

Agentic AI in supply chain only works inside hard constraints. How to bound what an agent may decide and keep every action auditable.

May 5, 20265 min read

Engineering

The data you need is worse than you think, and that is fine

Missing scans, wrong timestamps, and duplicated events are normal. How to build optimization that survives the data a real network produces.

Apr 28, 20264 min read

Engineering

Predictive ETAs: what accuracy actually requires

A predictive ETA is a distribution, not a timestamp. How calibrated arrival estimates change promises, staffing, and customer communication.

Apr 14, 20264 min read

Engineering

Estimation and ground truth: closing the loop

A model is only as good as the ground truth behind it. How to calibrate logistics estimates so stated confidence matches observed outcomes.

Apr 7, 20265 min read

Network design

Hub location under demand uncertainty

Hub location decisions outlive the forecasts behind them. How to place hubs that stay defensible when volumes and flows move against you.

Mar 31, 20264 min read

Network design

Digital twins that earn their keep

Most supply chain digital twins are expensive dashboards. What separates a twin that changes decisions from one that just renders the network.

Mar 17, 20265 min read

Network design

Network design is a portfolio problem

Supply chain network design is a portfolio problem, not a single optimum. How to choose a footprint that performs across demand scenarios, not one.

Mar 3, 20265 min read

Pricing and yield

Pricing under uncertainty: why margins leak at the quote

Every quote is a bet on cost you have not incurred yet. How to size the risk buffer in a price instead of guessing at a flat percentage.

Feb 24, 20264 min read

Pricing and yield

Cost to serve: the number most networks cannot produce

Cost to serve analysis at shipment level: how to allocate the costs that averages hide, and which customers and lanes actually earn their margin.

Feb 10, 20265 min read

Air cargo

Capacity is perishable: the airline economics of freight

An unsold slot is gone when the aircraft or vessel departs. How perishable capacity should change the way freight is priced through the booking window.

Jan 27, 20264 min read

Air cargo