Signal Identification

Design efficient early signals to validate product assumptions.

When to Use

When you have a prioritized assumption and need the fastest way to validate it.

The Quality Bar

A good signal is:

• Early: Obtainable at idea/prototype stage
• Cheap: Minimal cash/time
• Attributable: Directly reduces uncertainty
• Decisive: Has clear success/failure threshold
• Suitable: Appropriate for your context

Method Selection by Context

Context	Good Methods	Avoid
Enterprise B2B	Design partner LOIs, security questionnaires, ROI calculators, reference checks	Smoke tests, consumer ad funnels
SMB SaaS	Discovery calls, lightweight trials, email tests, usage analytics	-
Consumer	Ad-driven intent, waitlist conversion, community polls, preorders	-
Regulated	Standards mapping, SME review, regulatory preflight	Collecting sensitive data
Feasibility	Engineering spikes, benchmarks, vendor evals	User-facing experiments

The Process

1. Classify the Assumption

What lens? Desirability, Feasibility, Viability, or Usability?

2. Brainstorm Signals (5+)

For each, note:

• What would constitute positive evidence?
• How to obtain quickly?
• Why suitable for this context?

3. Select Best Signal

Document:

• Signal description
• Method (step-by-step)
• Participants/sample needed
• Timebox and cost
• Success threshold (quantified)
• Data captured
• Risks and mitigations
• What to do next if positive

Output

• Brainstorm list (5+ signals)
• Selected signal with full details
• Summary explaining choice

When Not to Use

Do not use this skill when the request is unrelated, low-stakes, or better handled by a simpler direct response.