A/B Testing Deployed Models

Summary

Rolling out a new model to a subset of traffic and comparing its real-world business impact against the current model — the ultimate validation that a model actually improves outcomes, not just offline metrics.

• 1Design an A/B test plan comparing a new model version against the current production model.
• 2Learn why offline accuracy improvements don't always translate to better business outcomes.
• 3Connect this back to the A/B testing statistics fundamentals from earlier phases.