What caused the sudden 30% increase in payment failures for Tamara's installment plans in the last week?

Introduction

The sudden 30% increase in payment failures for Tamara's installment plans in the last week is a critical issue that demands immediate attention. This analysis will systematically identify, validate, and address the root cause while considering both short-term fixes and long-term implications for the product.

I'll approach this problem by first clarifying key details, ruling out external factors, and then diving deep into the product's user journey and metrics. From there, I'll form data-driven hypotheses, conduct root cause analysis, and propose a comprehensive resolution plan.

Step 1

Clarifying Questions (3 minutes)

• Looking at the timing, I'm thinking this could be related to a recent system change. Has there been any significant update to the payment processing system in the past two weeks?

Why it matters: System changes often correlate with sudden metric shifts. Expected answer: Yes, a minor update was pushed last week. Impact on approach: If yes, we'd focus on technical issues; if no, we'd look more at external factors.

• Given the specificity of the 30% increase, I'm curious about our measurement accuracy. Has there been any change in how we calculate or track payment failures recently?

Why it matters: Ensures we're addressing a real issue, not a measurement anomaly. Expected answer: No changes in measurement methods. Impact on approach: If changed, we'd need to audit our analytics first; if not, we proceed with investigating the actual failures.

• Considering user segments, I'm wondering if this affects all customer types equally. Do we see any patterns in terms of new vs. returning customers, or across different product categories?

Why it matters: Helps narrow down potential causes and affected user groups. Expected answer: The increase is more pronounced among new customers. Impact on approach: If segmented, we'd focus on specific user journeys; if uniform, we'd look at broader system issues.

• Thinking about external factors, have there been any significant economic events or competitor actions in the past week that might influence consumer behavior or our market position?

Why it matters: External events can dramatically impact financial products. Expected answer: No major external events noted. Impact on approach: If yes, we'd consider market-wide trends; if no, we'd focus more on internal factors.