Metrics question

You are a PM for an e-commerce company. Due to some mistakes, the data team lost all key metrics. What are the metrics you will track as PM?

Practice this question out loud. An AI interviewer asks it, follows up like a real interviewer would, and scores your answer. Type or speak.

What this question tests

Ability to rebuild a metric framework for an e-commerce business from first principles, covering the full funnel.

Start from the business model, success depends on acquiring, converting, and retaining paying customers profitably.
Define top of funnel metrics, site traffic, traffic source mix, and conversion rate from visit to purchase.
Define core transaction metrics, average order value, cart abandonment rate, and repeat purchase rate.
Define retention and lifetime value metrics, customer retention rate and estimated lifetime value versus acquisition cost.
Define operational guardrails, fulfillment time, return rate, and support ticket volume, since these affect trust and future purchases.

Structures metrics into a clear funnel, acquisition, conversion, retention, rather than a flat unordered list.
Names the key ratio determining business health, lifetime value to acquisition cost, as the most important combined metric to rebuild first.
Includes an often missed operational guardrail, return rate and fulfillment time, since these directly affect repeat purchase behavior.

Listing many metrics with no structure or prioritization of which to rebuild first.
Ignoring retention and lifetime value, focusing only on traffic and conversion.
No mention of operational metrics like returns or shipping that affect trust.

Which three metrics would you prioritize rebuilding first with limited engineering time?
How would you validate the rebuilt metrics are accurate before trusting them again?