Why are Netflix Originals previews not loading for 30% of titles?

Introduction

Netflix Originals previews not loading for 30% of titles is a critical issue that directly impacts user experience and engagement. As we dive into this problem, we'll systematically analyze potential root causes, validate hypotheses, and develop a comprehensive solution strategy.

Step 1

Clarifying Questions (3 minutes)

• Considering the scope, I'm thinking this might be a recent issue. Has there been a sudden spike in preview loading failures, or has it been a gradual increase over time?

Why it matters: Helps determine if it's a new problem or an ongoing issue worsening over time. Expected answer: A sudden spike within the last week. Impact on approach: A sudden spike would point towards recent changes or technical issues.

• Given the specific 30% figure, I'm assuming we have robust tracking in place. Can you confirm our monitoring system's reliability and whether there have been any recent changes to how we measure preview loading?

Why it matters: Ensures the problem is real and not a result of measurement errors. Expected answer: Monitoring is reliable, no recent changes to measurement. Impact on approach: If confirmed, we can focus on actual causes rather than data integrity issues.

• Noticing the 30% figure, I'm wondering about user segmentation. Is this issue affecting all user segments equally, or are certain groups (e.g., device types, regions) more impacted?

Why it matters: Helps narrow down potential technical or infrastructure-related causes. Expected answer: Issue is more prevalent on certain devices or in specific regions. Impact on approach: Would guide us to investigate device-specific or regional infrastructure issues.

• Considering potential recent changes, have there been any significant updates to the content delivery network (CDN) or preview encoding processes in the past month?

Why it matters: Recent changes often correlate with new issues. Expected answer: Yes, a CDN provider change or encoding update was implemented recently. Impact on approach: Would focus our investigation on recent infrastructure or process changes.