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Twelve weeks in three acts, each introducing one new rule for deciding who goes first.

Lectures

Twelve lectures, in three acts. Act I is the physics — why queues form, how to measure one from the outside, and what waiting costs. Act II is five ordering rules, one a week, each of which buys something and charges somebody. Act III is what happens when the queue turns out to be connected to other queues and full of people who have worked out what you are doing.

Every week carries a simulation you can drive yourself, set in a real place — a café you rearrange, an airport line you measure two ways, an aircraft at a gate, a dialysis unit where the rule decides who lives. They are not illustrations of the argument. In several cases the simulation is what corrected it, and each lecture says so where it happened.

Every week also has a slide deck, linked at the top of its page and carrying the same live simulation, so the lecture in the room and the lecture on the site are the same lecture rather than two accounts of it.

Allow twenty minutes a week: about fifteen to read, and the rest for the controls, which is where most of the actual learning is.

If you want to see how the weeks depend on each other before reading any of them, the shape of the semester lays out the chain and shows where the four pieces of assessment fall against it.

The Queue You Didn't Notice

Every queue you have ever stood in was designed. This week is about learning to see the decision instead of the line.

Week 1 · 22 February 2027

Variability, Not Busyness

Queues do not form because a system is busy. They form because it is unpredictable — and the closer to capacity it runs, the worse that gets.

Week 2 · 1 March 2027

Little's Law

One equation, provable in a page, that lets you measure a queue you have no access to — and catches most people's intuition out.

Week 3 · 8 March 2027

The Cost of Waiting

Waiting is a real cost that almost never appears in anyone's accounts — which is precisely why systems produce so much of it.

Week 4 · 15 March 2027

First Come, First Served

The rule you have believed in since you were four years old, examined for the first time — including what it costs and what it quietly gets wrong.

Week 5 · 22 March 2027

Shortest Job First

Reorder the same people and the average wait falls, with no extra staff and no extra hours. The free lunch is real. Somebody still pays for it.

Week 6 · 29 March 2027

Triage: Order by Need

The one place we already accept that arrival order is indefensible — and a live disagreement between the two people teaching it.

Week 7 · 19 April 2027

Pay to Skip: Order by Price

Every queue already sorts by willingness to pay — in time. Charging money instead is the most efficient and least popular thing in the course.

Week 8 · 26 April 2027

Don't Queue At All

Appointments, reservations and virtual queues do not remove the wait. They move it somewhere you cannot see — which is sometimes exactly right.

Week 9 · 3 May 2027

Queues in Networks

The set-piece. Everything from weeks 2, 6 and 8 applied to the aircraft we left in week 2 — and the discovery that fixing one queue can break the system.

Week 10 · 10 May 2027

Queues That Know You're Waiting

People are not jobs. They balk, they renege, they game the rule, and they react to being told how long they will wait — which changes how long they wait.

Week 11 · 17 May 2027

There Is No Neutral Queue

Mean, tail, fairness or revenue — a queue can only optimise one. The closing lecture, on the system where society had to choose out loud.

Week 12 · 24 May 2027