What factors are contributing to the sudden 30% increase in customer complaints about BT Group's Fibre broadband speeds this month?

Introduction

The sudden 30% increase in customer complaints about BT Group's Fibre broadband speeds this month is a critical issue that demands immediate attention. To address this problem effectively, I'll employ a systematic approach to identify, validate, and resolve the root cause while considering both short-term fixes and long-term implications for our product and customers.

Step 1

Clarifying Questions (3 minutes)

• Considering the abrupt nature of the increase, I'm wondering if there have been any recent network changes. Have we implemented any major updates or modifications to our Fibre broadband infrastructure in the past month?

Why it matters: Recent changes could directly impact service quality. Expected answer: Yes, a firmware update was rolled out to our network equipment. Impact on approach: If confirmed, we'd focus on the update's impact and potential rollback.

• Given the specific 30% figure, I'm curious about our measurement methodology. Has there been any change in how we track or categorize customer complaints recently?

Why it matters: Ensures we're comparing apples to apples in our metrics. Expected answer: No changes in measurement methodology. Impact on approach: If changed, we'd need to reassess the actual increase magnitude.

• Thinking about potential external factors, have there been any significant changes in internet usage patterns or major events that could strain our network?

Why it matters: External factors could explain increased demand and subsequent slowdowns. Expected answer: No major events, but slight increase in streaming usage. Impact on approach: If confirmed, we'd investigate capacity planning and peak usage handling.

• Considering customer segments, I'm wondering if this issue is widespread or concentrated. Are we seeing this increase across all customer segments and geographical areas?

Why it matters: Helps narrow down potential causes and affected areas. Expected answer: Issue seems more prevalent in urban areas and during peak hours. Impact on approach: Focus on high-density areas and peak time performance.