What aspect of OpenTelemetry allows for manual reporting of measurement data?

The aspect of OpenTelemetry that facilitates manual reporting of measurement data is the API. The OpenTelemetry API provides developers with the necessary functions and methods to create, manage, and report telemetry data, including metrics and traces. With this API, developers can manually instrument their applications by adding specific calls in the code to record measurement data in real-time.

This capability is crucial for applications that require customized telemetry beyond automatic instrumentation. By leveraging the API, developers can ensure that the data collected aligns with their specific monitoring and performance needs, allowing for more insightful analysis and troubleshooting in their applications. This manual reporting capability is essential for tailoring observability solutions that fit various use cases effectively.