Latency and error reports increased in learning platform. Prioritize the investigation

Problem Statement Description

You are investigating a recent increase in latency and user-reported errors on a learning platform where users enroll in courses, stream lessons, submit quizzes or assignments, track progress, and work toward course completion. The affected audience includes privacy-conscious users who may be especially sensitive to failed sessions, repeated logins, unclear error messaging, or unexpected data handling during learning workflows.

Your task is to prioritize the root-cause investigation: define what you would check first, how you would narrow the issue, and how you would decide whether the problem is platform-wide or isolated to specific users, courses, devices, regions, or workflow steps. The focus is not to redesign the product, but to structure a clear, evidence-driven incident investigation that protects learner trust and minimizes impact on completion.

Assume the reports include both slower page or video load times and visible errors during the learning journey. You should consider both technical signals and user-facing symptoms, while being careful to validate data quality before drawing conclusions.

The experience should consider:

- How to frame the anomaly: when the increase started, how large it is, and which latency/error metrics changed.

- Which parts of the learning workflow to inspect: login, course discovery, lesson playback, quiz submission, progress saving, certificate generation, or notifications.

- How to segment the issue by platform, app version, browser, geography, network type, course type, user cohort, and privacy settings.

- How to verify whether monitoring, logging, analytics, or user-reporting systems are accurate and comparable to the baseline.

- What hypotheses to evaluate across frontend, backend, content delivery, authentication, third-party services, data storage, and recent releases.

- What evidence would help prioritize severity, including completion drop-off, retry rates, failed submissions, support volume, and affected learner count.

- How to think about immediate mitigation, user communication, escalation, and longer-term prevention without jumping to an unsupported cause.

Your goal is to present a structured RCA investigation plan that shows sound prioritization, clear use of evidence, and an understanding of how latency and errors can disrupt learning completion and user trust.