According to the COBIT 2019 Design Guide, a service manager is responsible for managing the development, implementation, evaluation and ongoing maintenance of new and existing products and services. A service manager ensures that the products and services meet the needs and expectations of the customers and stakeholders, and that they are aligned with the enterprise strategy and objectives.  A service manager also monitors and reports on the performance and quality of the products and services, and initiates improvement actions when necessary. 1 , p.  64  References:   1 : COBIT 2019 Design Guide: Designing an Information and Technology Governance Solution