Scoping a software, web, or app project is not just a once-and-done exercise
Whether you create your product for external clients, consumers, or internal users, your users will eventually see some version of your product. Maybe that’s a wireframe, a clickable prototype, an interactive prototype with dummy data, or a live product. New feature requests and change requests at any stage of development, especially after launch, are a fact of life for most products that have users.
https://www.brainleaf.com/blog/brainleaf-news/prioritize-user-feedback/