Perhaps a bit broad question, but definitely one of the things that probably everyone is consciously either intuitively defining or trying to define, or has already found some solution / definition to this question.
So, what do you think is an effective measurement for the impact or effectiveness of sound?
Your own judgement? A colleague's judgement? A test audience's feedback? A director's feedback? An employer's feedback?
What is the thing that gives you the certainty that what you've done is appropriate and will have the desired impact? Or that an approach B or a soundtrack B is "more effective" than approach A / soundtrack A. If you compare your work to others' work, what kind of criteria do you use in the assessment? What defines "effectiveness" and "appropriateness" in sound? Do some criteria for measuring them even exist?
What would/do terms like "cutting edge", "state of the art" or "advanced" mean in sound?