Do you need a second barista?
Example: You’re launching a new product. Sales might be 50k, 100k, or 200k units depending on the economy. Instead of one “best guess,” you simulate 50,000 possible futures — then say: “We have a 90% chance of breaking even in year two.” A simulation is only as good as its assumptions. If you model human behavior as perfectly rational, or ignore rare but catastrophic events, your pretty graph is fiction. Simulation doesn't predict the future. It explores possibilities. Your Turn (Section 10.05 in action) You’ll likely build a simple simulation soon — maybe rolling dice to model a game, or a spreadsheet with random arrivals. The magic isn’t in the code or the math. It’s in the question you ask before you simulate: 10.05 modeling with simulation
That’s the simulation mindset. And it’s one of the most useful mental tools you can leave this class with. Next up: analyzing simulation output — when to trust the average, and when to worry about the outliers. Do you need a second barista
None of them let you run a “practice round” in real life — but you can simulate them. In many curricula, section 10.05 is where things get real . Not real as in easy — real as in real-world messy . By now, you’ve learned equations, graphs, and probability. But the world doesn't come in neat textbook problems. A factory breakdown doesn't announce its arrival with a bell curve. A viral outbreak doesn't pause while you solve for x . Instead of one “best guess,” you simulate 50,000