The project manager should notify the functional manager that resources are released after completing a project successfully in a functional organization. A functional organization is a type of organizational structure where employees are grouped by their functions or specialties, such as finance, marketing, or engineering. In a functional organization, the functional manager has more authority and control over the resources than the project manager. Therefore, the project manager should inform the functional manager when the resources are no longer needed for the project and can be reassigned to other tasks or projects.