What factors led to a 30% increase in failed message deliveries for Tanla's Wisely CPaaS solution last week?

Introduction

The recent 30% increase in failed message deliveries for Tanla's Wisely CPaaS solution is a critical issue that demands immediate attention. This analysis will systematically investigate the root cause, considering both technical and non-technical factors that could have contributed to this significant performance drop. 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 change. Has there been any significant update or deployment to the Wisely platform in the past week?

Why it matters: Recent changes often correlate with performance issues. Expected answer: Yes, there was a minor update to the message routing algorithm. Impact on approach: If confirmed, we'd focus on the new algorithm's performance and potential rollback options.

• Considering the scale of the issue, I'm wondering about its distribution. Is the 30% increase in failed deliveries uniform across all customer segments or concentrated in specific areas?

Why it matters: Helps narrow down if it's a global issue or specific to certain user groups or message types. Expected answer: The increase is more pronounced for enterprise customers sending bulk messages. Impact on approach: We'd prioritize investigating enterprise-specific configurations and bulk message handling.

• Given the nature of CPaaS, I'm curious about network dependencies. Have there been any reported issues with major telecom carriers or changes in their APIs recently?

Why it matters: External dependencies can significantly impact message delivery success. Expected answer: No major carrier issues reported, but there's been an increase in traffic from a new large customer. Impact on approach: We'd examine how the system handles increased load and if there are any capacity issues.

• Thinking about potential data anomalies, has there been any change in how failed deliveries are measured or logged in the past week?

Why it matters: Ensures we're dealing with a real issue and not a measurement error. Expected answer: No changes to measurement systems, but there was a brief outage in one of the logging servers. Impact on approach: We'd need to validate the data integrity and potentially adjust our analysis to account for any missing logs.