Most software projects treat permissions as an afterthought: log in, and everyone is an admin until someone complains.
Role-based access control (RBAC) is not a security feature. It is a product decision. It defines what each person in the operation can see and do — and getting it wrong is the fastest way to build a system staff stop trusting.
Start with the workflow, not the feature list
Before writing auth code, answer these questions for each role:
- What does a typical day look like for this person?
- What do they need to see to do their job?
- What should they never be able to do by accident?
- What actions should leave a visible record?
Keep it auditable
Every important action should be traceable. Who changed what, when, and from which session. Audit trails turn "someone must have done it" into a searchable answer.
Ship it in phases
Permissions do not have to be perfect on day one. Ship the roles the workflow actually needs, then refine as people use the system. A small role model that is used is worth more than a comprehensive one that is ignored.