Final answer:
To assign a worker as a scheduler with access to groups X and Y but not Z, create a role with the necessary permissions, assign access to the desired groups, and ensure careful configuration of access controls.
Step-by-step explanation:
To assign a worker as a scheduler and allow them to act on a manager's behalf while restricting access to certain scheduling groups, you would follow a protocol that could involve a permissions or role-based system. First, you would create a role with the appropriate permissions that include the ability to manage schedules and act on behalf of a manager.
Then, you would grant access to this role for scheduling groups X and Y, but specifically exclude access to group Z. This can be done programmatically in software that supports user roles and permissions, or through a manual process if such a system is not in place. It's critical to ensure that the access control settings are correctly configured to prevent any unauthorized access to sensitive data or operations.