A useful first release is smaller than the whole vision.
When a company describes the product it eventually needs, the first list often includes every role, every integration and every exception. That vision is useful—but it is a poor first build target. A better first release proves one important workflow from beginning to end.
Start with the people involved, the decision they need to make and the record everyone should trust. Then test the handoffs using real scenarios. Once that path works, adjacent modules have a stronger foundation and a clearer reason to exist.