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In Front of an Unfamiliar System

How to start when you know nothing at all.

입문 · Lessons 31 · Lab 10

Curriculum

Start by Observing

Hypothesis and Verification

If It Is Not Falsifiable It Is a Guess reading
Pinning the Symptom to a Number lab
Quiz: Hypothesis and Verification quiz

Reproducible Notes

Good Debugging Leaves No Trace reading
Leave a Record the Next Person Can Rerun lab
Quiz: Reproducible Notes quiz

The First 24 Hours

What to Ask For the Moment You Arrive at the Customer reading
Draw the Blast Radius First reading
Draw the Map Before You Touch Anything lab
Quiz: The First 24 Hours quiz

The answers do not match the system

One word, three systems, three meanings

The agreed scope and the assumption ledger

Order of collection, and sealing what you collected

Collect what disappears first reading
Collect in order of volatility, then seal it lab
Quiz: collection order and sealing quiz

Shrinking to a minimal reproducible case

Answering without touching anything

Reference docs