Module 01 · Free
The Language of Systems
The five behaviours every production system exhibits, stated as maths before they are stated as advice.
6 lessons · 6 videos · 5h 30m
- 01.01
Why Your Deploys Got Worse
State the thesis of this course: AI raises how much you ship and how often it breaks, so operational friction now compounds instead of staying flat.
- 01.02
The Hockey Stick
Explain why latency scales as 1/(1-utilisation) rather than linearly, so a system that is fine at 70% is vertical at 90%.
- 01.03
Little's Law
State L = lambda x W and apply it to a queue, knowing it holds for any arrival pattern and any service order.
- 01.04
Why Averages Lie
Explain why a good average hides a bad tail, and why p99 at scale is the size of your support inbox.
- 01.05
Availability Is Multiplication
State the probability axioms and say precisely when two events are independent - the condition every availability calculation in this course quietly assumes.
- 01.06
Feedback, Lag, Overshoot
Define a feedback loop - an input, an output, a measurement of that output, and an error signal - and say what the loop is trying to hold steady.