Which framework provides best practices for IT service management?

ITIL, or the Information Technology Infrastructure Library, is recognized as the leading framework that provides best practices for IT service management (ITSM). ITIL focuses on aligning IT services with the needs of the business and emphasizes delivering quality services that enhance customer satisfaction. It includes detailed guidance on various aspects of IT service management, such as service strategy, design, transition, operation, and continual service improvement.

The framework is structured around a set of best practices that have been developed through extensive industry experience. ITIL's processes help organizations improve efficiency and reduce risks in delivering services, making it a vital tool for IT departments working to support business goals and improve service delivery.

The other frameworks mentioned have different focuses: COBIT is more about governance and management of enterprise IT resources, ISO 27001 focuses on information security management systems, and Six Sigma is centered on process improvement in manufacturing and service operations but not specifically targeted at IT service management. This distinction highlights why ITIL is the appropriate choice for best practices specifically related to IT service management.