Map responsibilities before naming roles
Begin with a list of activities inside one customer organization: viewing reports, inviting colleagues, editing integrations, preparing requests and approving sensitive changes. For each activity, name the business reason and the records it affects. Then group compatible responsibilities into roles that an administrator can explain without a diagram. Avoid an all-powerful manager role simply because it is convenient during development. A reporting specialist may need complete historical visibility while having no authority to modify settings. Write one example of an allowed action and one denied action for every role. Those examples become useful acceptance checks.
Keep organization boundaries explicit
A person can belong to several organizations, so an account identifier alone is not a complete access decision. Every relevant request should establish the active organization and verify membership against the requested resource. Apply the same boundary to exports, search results, background tasks and attachment links. Changing the workspace selector must not leave data from the previous company on screen. Test with two organizations that use similar project names and overlapping team members. Include a user who loses membership while a report is being prepared. Decide whether that report should finish, be discarded or require fresh authorization before download.
Treat invitations and departures as workflows
An invitation needs a recipient, a proposed role, an expiry and a visible status. Explain what happens when the recipient already has an account or accepts from the wrong account. Privileged access should not appear merely because someone possesses an old invitation link. Departure requires more than hiding a user from a list: review active sessions, personal API credentials, scheduled exports and ownership of shared resources. Separate removal from deletion of historical work. Before removing the last owner, require a deliberate ownership transfer or another defined recovery path. Record who made each change and what authority they used.
Make permission changes reviewable
Show administrators the consequences of a role change before saving it, especially when it grants access to financial records or integration settings. Keep a readable history with the actor, target organization, previous role, new role and time. Audit records should remain useful after a display name changes. Test access at the server as well as in the interface; a hidden button is not an authorization boundary. Finally, run a short exercise with support: identify why a user cannot complete a task without granting broader permissions as a shortcut. The resulting model should be understandable, testable and practical to operate.