What guardrail metrics should Uber track for Driver App

Problem Statement Description

Product context: Uber is a mobility and delivery platform; its products include rides, Uber Eats, grocery and retail delivery, freight, driver and courier tools, and marketplace pricing.

Uber’s Driver App is the primary interface through which drivers receive trip opportunities, navigate pickups and drop-offs, manage earnings, and stay informed while on the road. Because Uber operates a two-sided marketplace, changes to the Driver App can improve one objective while unintentionally hurting driver trust, rider reliability, safety, or marketplace balance.

In this metrics interview, define the guardrail metrics Uber should track for the Driver App. Assume these metrics will be used to evaluate product changes, experiments, and operational decisions across markets, including rides that serve time-sensitive customers such as business travelers.

Focus on metrics that help Uber detect unintended negative consequences, not just measure success. Your answer should clarify what each metric is protecting, how it would be measured, and when it would trigger concern.

The metric framework should consider:

- The core Driver App workflows: going online, accepting trips, navigating, completing trips, and reviewing earnings

- Clear metric definitions, including numerator, denominator, time window, and unit of analysis

- Driver cohorts such as new vs. experienced drivers, part-time vs. full-time drivers, market/city, vehicle type, and trip type

- Marketplace impacts across both drivers and riders, especially reliability, wait times, cancellations, and supply availability

- Safety, trust, compliance, and support-related signals that should not deteriorate

- Instrumentation needs, including app events, trip lifecycle data, GPS signals, payment data, and support contacts

- Guardrail thresholds, monitoring frequency, and how metrics would inform experiment or launch decisions

The goal is to produce a practical guardrail metric set that helps Uber ship Driver App improvements responsibly while maintaining driver satisfaction, rider reliability, safety, and marketplace health.