Originally Posted by
eglnyt
There is a third problem to overcome. Nobody actually knows what the user requirements for a current or future ATC technological system are. The requirements are mostly embedded in the existing technology and not written down.
NATS is obsessed by requirements, and has thereby created its own quagmire. What you need is solutions to the current issues, like a 10x increase in aircraft (mostly UAS) in the next decade and digitisation.
No amount of requirements will solve those problems.