Discovery Interview Prep vs A/B Test Planner

Discovery Interview Prep

By Dean Peters (PM)

Plan customer interviews that uncover real problems instead of confirming your assumptions.

A/B Test Planner

By Mohit Agarwal (PM Skills)

Design product experiments with clear hypotheses, metrics, sample sizes, and decision rules.

Discovery Interview Prep

• Asks adaptive questions about your research goals, target customers, and constraints
• Recommends the right interview methodology based on your product stage and what you need to learn
• Generates a tailored question framework with bias warnings and success criteria
• Helps you avoid leading questions and confirmation bias during customer interviews
• Outputs a ready-to-use interview guide for qualitative customer research

A/B Test Planner

• Creates structured test plans with hypothesis, variants, metrics, and decision criteria
• Calculates required sample size and estimates how long your test needs to run
• Defines primary success metrics and guardrail metrics to protect key business outcomes
• Provides a results interpretation guide so you know when to ship, iterate, or stop
• Flags risks like low traffic, multiple comparisons, and premature result-checking

Reach for Discovery Interview Prep when…

• You're validating a new product idea and need to confirm the problem is real
• You're investigating why customers are churning or not activating on key features
• You need to prepare for customer development interviews but aren't sure where to start
• You want to understand what jobs customers are trying to get done before building features

Reach for A/B Test Planner when…

• You're planning to test a new feature, pricing change, or UI redesign
• You need to know how many users and how long a test requires
• You want a clear decision framework before launching an experiment
• You're unsure whether your test setup will produce trustworthy results