Interview Questions › Root Cause Analysis

Driver churn, rider cancellation, and ETA complaints all spiked

In your largest market (NYC), active weekly driver supply fell 18%, rider pickup ETAs doubled from 4.2 mins to 8.9 mins, and passenger cancellation rate reached an unsustainable 22%. Unpack this marketplace death spiral.

Context

A new municipal minimum wage regulation and dynamic platform commission algorithm went live 30 days ago.

Clarifying questions to ask first

• Did driver hourly earnings go up or down after the new platform commission algorithm?
• Are drivers multi-apping and accepting competitor trips?

How to approach it

1. Model the Two-Sided Marketplace Negative Feedback Loop: Driver Supply Drop -> Higher ETAs -> Rider Cancellations -> Lower Driver Effective Hourly Earnings -> Accelerated Driver Churn
2. Analyze the economic driver: Net hourly take-home pay after gas, vehicle depreciation, and platform commissions
3. Examine competitive poaching by rival ride-hailing and food delivery platforms
4. Formulate immediate marketplace balancing levers (incentives, guaranteed earnings, surge calibration)

Framework: Two-Sided Marketplace Death Spiral Deconstruction -> Driver Net Earnings Economics -> Pricing & Dispatch Feedback Dynamics -> Emergency Rebalancing Levers

Sample answer

• Platform commission algorithm increased effective take rate, reducing net driver hourly pay below competitor baseline
• Rider cancellations wasted unpaid driver travel time, driving frustration
• Competitor offering $500 weekly bonus guarantees for 40 completed rides

1. Economic analysis reveals: Driver unpaid deadhead travel time increased by 60% due to inefficient dispatching; net driver hourly wage fell from $32/hr to $21/hr, causing mass migration to rival platforms

Marketplace death spiral triggered by unpaid driver travel distance; instituted paid pickup compensation, deployed destination filters, and launched earnings floor guarantees.

What interviewers look for

• Driver Hourly Take-Home Earnings
• Driver Utilization Rate (Time with Passenger)
• Rider ETA to Pickup
• Supply-Demand Imbalance Ratio