Explain ML Project Milestones, Scope, and Conflict
Company: Airbnb
Role: Machine Learning Engineer
Category: Behavioral & Leadership
Difficulty: medium
Interview Round: Onsite
Describe an ML project you worked on, focusing on how you defined its scope, chose milestones, and handled a disagreement that affected delivery. Explain your contribution and how the project plan changed as evidence arrived.
### Constraints & Assumptions
- Use your own project and distinguish your decisions from team decisions.
- Explain the ML outcome and the product or operational outcome separately.
- Describe milestones with observable acceptance criteria rather than only dates or broad labels.
- Discuss one actual disagreement over scope, priorities, technical direction, or evaluation. Do not invent conflict or quantitative results to make the story more dramatic.
### Clarifying Questions to Ask
- Should the deep dive emphasize project planning, technical evaluation, or the disagreement and its resolution?
- Would a brief overview of the data, model, and production path help establish context?
- Which milestone or scope change would the interviewer like to examine in detail?
```hint Connect the plan to a decision
For each milestone, identify what its result allowed the team to decide next, including whether to stop or reduce scope.
```
### What a Strong Answer Covers
- The initial goal, project boundaries, dependencies, and personal ownership.
- Milestones tied to data feasibility, model quality, and operational readiness.
- Competing positions in a disagreement, including the legitimate concern behind each.
- Evidence used to choose an action, the resulting scope decision, and communication to affected people.
- An honest outcome and a lesson grounded in that sequence of decisions.
### Follow-up Questions
- Which milestone would you change if the same project started again?
- What would you do if the model met an offline target but failed the product or operational target?
Overview: Explain an ML project through scope decisions, measurable milestones, stakeholder conflict, online readiness, and evidence-based changes to the plan.
Read the full Airbnb Machine Learning Engineer interview experience this question came from