Scenario

A food-delivery marketplace plans to let couriers (dashers) opt in to deliver by bicycle in addition to cars.

Question

State the primary business goal and supporting hypotheses for offering a bike delivery mode. Define the key metrics to evaluate the program, including:

• Success (primary/secondary) metrics
• Guardrail metrics
• Driver/mechanism metrics

Before a full rollout, design an experiment to evaluate impact. Specify:

• Randomization unit choice (e.g., dasher vs. geo/time clusters vs. market)
• Pre-launch checks (data logging, eligibility, safety/config, power)
• Analysis plan (estimation approach, non-compliance handling, variance reduction, heterogeneity, stopping rules)

Assume an urban environment with short-trip density and parking constraints. Note any additional assumptions you make.