Why has the average processing time for GoCardless's Direct Debit payments increased by 20% in the last two weeks?

Introduction

The recent 20% increase in average processing time for GoCardless's Direct Debit payments over the last two weeks is a critical issue that demands immediate attention. This unexpected slowdown in payment processing could significantly impact customer satisfaction, transaction volumes, and ultimately, revenue. To address this problem, I'll employ a systematic approach to identify, validate, and resolve the root cause while considering both short-term fixes and long-term strategic implications.

Step 1

Clarifying Questions (3 minutes)

• Looking at the timing, I'm thinking there might have been a recent system update. Has there been any significant changes to our payment processing infrastructure in the last month?

Why it matters: System changes often lead to unexpected performance issues. Expected answer: Yes, there was a minor update to our payment gateway. Impact on approach: If confirmed, we'd focus on the update's impact and potential rollback options.

• Considering the scale of the increase, I'm wondering about transaction volume changes. Have we seen any unusual spikes in payment volumes recently?

Why it matters: Sudden volume increases can strain system resources. Expected answer: Transaction volumes have been relatively stable. Impact on approach: If volumes are stable, we'd shift focus to internal system issues rather than capacity problems.

• Given the nature of Direct Debit payments, I'm curious about bank-side changes. Have there been any reported issues or changes from our partner banks?

Why it matters: External factors could be contributing to the slowdown. Expected answer: No significant changes reported from partner banks. Impact on approach: If confirmed, we'd prioritize internal factors in our investigation.

• Thinking about user behavior, have we noticed any changes in the types of transactions being processed?

Why it matters: Shifts in transaction types could impact processing times. Expected answer: There's been a slight increase in high-value transactions. Impact on approach: This could lead us to investigate whether certain transaction types are disproportionately affected.