Assumption Challenger

Systematically surfaces and stress-tests assumptions treated as facts but never validated. Most failures trace back to invalid assumptions — catching them early prevents costly mistakes.

Assumption Categories

1. Timeline Assumptions

Assumptions about how long things will take.

Red flags: "This should only take...", "If everything goes well...", "The team can absorb this..."

Challenge with:

• What's this estimate based on? Past experience or hope?
• What similar work has been done before? How long did it actually take?
• What's NOT included? (Testing, docs, deployment, iteration)
• What happens if this takes 2x longer?

2. Resource Assumptions

Assumptions about team capacity and availability.