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Technology Readiness Level (TLR)

From our viewpoint, the 'C0 e-mail actuator' component has currently reached TRL 3: Analytical and experimental critical function and/or characteristic proof-of-concept. This assessment is based on the following:

  • Demonstrated Core Capability: We have successfully developed and demonstrated the fundamental capability of the 'C0 e-mail actuator' to perform its critical function: receiving a message, converting it into an email format, and successfully publishing it through a test mail server.

  • Unit-Level Validation: We have developed and executed unit tests to validate this specific functionality in a controlled laboratory environment, proving the basic operational principles of the component.

The main challenge to advance the 'C0 e-mail actuator' to TRL 4 is its robust integration into a demonstrator of the VALAWAI Toolbox. Currently, it functions as a standalone proof-of-concept. Achieving TRL 4 requires defining and implementing stable interfaces (APIs) and clear communication protocols to ensure seamless message flow and reliable interaction with upstream VALAWAI services that will feed it messages. This shift is challenging because it moves the component beyond isolated functionality, requiring it to become a reliable, integrated part of a larger system, which can expose complexities in data formats, message queues, and error propagation throughout the complete workflow.

A second significant challenge lies in ensuring compatibility and robustness with commercial email servers. Our current validation is limited to a test mail server. To achieve TRL 4, we need to test the 'C0 e-mail actuator' thoroughly with commonly used commercial email servers (e.g., Gmail, Outlook, Yahoo). This includes verifying successful email delivery, handling diverse security protocols (e.g., OAuth 2.0 for modern APIs), rate limits, and different authentication mechanisms without problems. This is challenging because commercial email providers have varying standards, security measures, and usage policies that can significantly impact deliverability and functionality, requiring specific adaptations and rigorous testing beyond a generic SMTP setup. Addressing these challenges will transition the 'C0 e-mail actuator' from a validated concept to a functionally integrated and tested component within a laboratory environment, ready for its role as part of the broader VALAWAI Toolbox.