A troubleshooting method
On This Lesson 4 topics
This lesson is planned. The outline below lists the topics it will cover. The full lesson has not been published yet.
In this lesson
follow a repeatable method instead of guessing.
Planned topics
- Steps: reproduce, narrow down, form one hypothesis, test it, fix, verify, prevent.
- Reproduce first; a bug you cannot reproduce you cannot confirm fixed.
- Change one thing at a time and note what you changed.
- Ask "what changed?": a deploy, config, data, or dependency.
- Write down what you tried; it helps you and others.
Draft outline details
Demonstration
a loop diagram: Observe, Hypothesis, Experiment, Result, back to Observe.
Check your understanding
Why change only one thing at a time?
Show answer
So you know which change had the effect.
Practice
Apply this lesson with the module's lab, exercises and quiz.
Marking a lesson complete is optional and you can undo it any time. Your progress stays in this browser.