Why has Viz.ai's CT triage notification system seen a 15% drop in successful alerts over the past month?

Introduction

The recent 15% drop in successful alerts for Viz.ai's CT triage notification system is a critical issue that demands immediate attention. This analysis will systematically investigate the root cause, considering both internal and external factors that may have contributed to this decline. We'll follow a structured approach to identify, validate, and address the underlying issues while keeping in mind both short-term fixes and long-term strategic implications.

Step 1

Clarifying Questions (3 minutes)

• Looking at the timing, I'm thinking there might be a recent system update. Has there been any software or algorithm changes in the past month?

Why it matters: Recent changes could directly impact system performance. Expected answer: Yes, there was a minor update to the image processing algorithm. Impact on approach: If confirmed, we'd focus on the update's impact and potential rollback.

• Considering user segments, I'm curious about the distribution of the drop. Is the 15% decrease uniform across all hospitals or concentrated in specific regions?

Why it matters: Helps identify if the issue is systemic or localized. Expected answer: The drop is more pronounced in certain regions. Impact on approach: We'd investigate region-specific factors if the drop isn't uniform.

• Thinking about the metric itself, I'm wondering if there have been any changes to how "successful alerts" are defined or measured. Has the definition or measurement process changed recently?

Why it matters: Ensures we're comparing apples to apples in our analysis. Expected answer: No changes to the definition or measurement process. Impact on approach: If changed, we'd need to recalibrate our analysis based on the new definition.

• Considering external factors, have there been any significant changes in CT scan volumes or patterns in the affected hospitals?

Why it matters: External changes could indirectly impact our system's performance. Expected answer: CT scan volumes have remained relatively stable. Impact on approach: If volumes changed, we'd need to factor this into our analysis of the alert drop.