The article here gives a very concrete answer to that question:
https://www.ajot.com/news/what-is-new-service-development-in-2026. It explains that measurement in NSD is a decision system, not just analytics. Metrics like time-to-first-value, adoption depth, exception economics, and reliability are tied directly to service health. It also highlights trust indicators such as audit success and document accuracy. What I liked is that these metrics connect operations, customer experience, and unit economics. They make it clearer whether a service can scale safely.