The first important step is identifying and managing all the stakeholder groups that an organization deals with. The first and most obvious stakeholder group is the customers, as in service management the organization’s main goal is to facilitate customer outcomes. Other examples of stakeholder collaboration include:

Developers working with other internal teams

Suppliers collaborating with the organization

Relationship managers collaborating with service consumers

Customers collaborating with each other

Internal and external suppliers collaborating with each other

The contribution to improvement of each stakeholder group at each level should be understood, as should the most effective methods to engage with them. Depending on the service and the relationship between the service provider and the service consumer, the expectations about the level and type of collaboration can vary significantly. It is important to involve stakeholders, and address their needs at all levels. Determining the type, method, and frequency of such messaging is one of the central activities related to communication.

https://www.bmc.com/blogs/itil-guiding-principles/

Nonrepudiation  provides an assurance that the sender of data is provided with proof of delivery and the recipient is provided with proof of the sender ' s identity, so neither can later deny having processed the data. Further, this concept can apply to any activity, not just the sending and receiving of data; in a more general sense, it is a mechanism to prove that an activity was performed and by whom. Nonrepudiation is typically comprised of  authentication , auditing/logging, and cryptography services.

https://www.sciencedirect.com/topics/computer-science/nonrepudiation

ITIL ®  has defined four dimensions that collectively are critical to the effective and efficient delivery of value to customers and other stakeholders in the form of products and services. These dimensions are:

Organizations and People

Information and Technology

Partners and Suppliers

Value Streams and Processes

https://www.bmc.com/blogs/itil-four-dimensions-service-management/

Error control  also regularly re-assesses the status of  known errors  that have not been resolved, taking account of the overall impact on customers and/or service availability, and the cost of permanent resolutions, and effectiveness of workarounds

https://www.bmc.com/blogs/itil-problem-management/#:~:text=Error%20control%20also%20regularly%20re,resolutions%2C%20and%20effectiveness%20of%20workarounds .