Organizations can use a single set of policies and controls to satisfy the requirements of both standards, shrinking the workload by up to 50%.
Developing common processes—such as incident management, change management, and risk assessment—reduces the overall time and budget needed for implementation and auditing. iso 27013 pdf
Implementing ISO/IEC 27001 when ISO/IEC 20000-1 is already in place (or vice versa). Deploying both standards simultaneously. Integrating two separate, existing management systems. Organizations can use a single set of policies
If one system exists, the focus is on breaking it down into individual elements (scope, policies, resources) and identifying how they can support the new standard. iso 27013 pdf