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World O1: The Control Room

Why watch at all?

You will learn: why a shop needs a control room, and what monitoring and observability mean.

Checked with Prometheus 3 on 1 Nov 2026

The problem

Lunch rush at Kedai Kancil. Checkout broke 20 minutes ago. Who tells you first?

Watch

Tap each point on the timeline.

Watching the shop’s numbers all the time is monitoring: Watching known numbers on the control room screens, with an alarm when one goes bad.. Tap each moment of the rush.

Try it

Open your first control room screen. Time 0 is 12:00.

Tap the chip kedai_checkout_errors_ratio, then press Run. Look at the graph.

Metrics in this data (tap to add):

Time 0 is when the data starts. The query looks back from the eval time.

Predict

The errors line jumps at 19m. The customer complained at 41m. How much warning could this screen give?

Watch

observability: How well you can ask new questions about a system from the outside, using what it tells you. means you can ask new questions from the outside. Monitoring watches the questions you planned. Sort each one.

Drag a card into a box. Or tap the card, then tap the box.

      Check

      Good reasons to watch? Swipe right for good.

      Swipe right for good, left for needs work. Or use the buttons.

      1 / 5

      Find trouble before customers do

      You did it!

      You can now explain why a shop needs a control room.

      Go deeper (optional)

      Monitoring tells you that something is wrong. Observability helps you find why. Both feed on the same data: metrics, logs and traces. That is the next lesson.

      Real rep, no tools needed:

      Real mission

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