THE STARTING QUESTION
A production website is slow. What would you investigate first?
Start with a hypothesis. None of these paths is always the right answer.
Decision Lab
Follow an investigation, or work through a decision of your own. Compare options and choose what to test next.
Step 1Illustrative scenario
These scenarios teach investigation, not a universal diagnosis. They are not claims about a specific production incident.
FREE PRACTICE
Make the next decision clearer
Write through a question or map the possible paths. Compare your options and choose what to test next.
This workspace stays in this tab and clears when you reload. Copy your plan or download your chart to keep it.
YOUR DECISION PLAN
A starting point to test
This is a summary of your thinking. The useful next step is to test it against evidence.
CONNECTED THINKING
See where each choice leads
Select a card to edit it. Add a child for the next level, or change its parent to connect a different branch.
Scroll to explore · Select cards with Tab and Enter · Use the arrows to move between cards
Your input stays in this tab. These tools do not upload, store, or send it to an AI service.