An HRIS permission structure determines which employee records a person can reach, which details they can see, and which actions they can perform. It matters because the same system may serve employees updating their own information, managers reviewing a team, HR specialists maintaining records, and connections supplying other services. Those users do not all need the same access.
A manager moving to a different department illustrates the challenge. The manager needs access to the new team, but should not automatically retain access to the old team’s unrelated personnel details. A sound design checks the complete access the account receives, including inherited roles, delegated duties, reports, and exports.