Which is an input to the service value system?

The key inputs to the SVS are opportunity and demand. The output of the SVS is value delivered by products and services. Opportunity refers to options or possibilities to add value for stakeholders or otherwise improve the organization

https://www.bmc.com/blogs/itil-service-value-system/#:~:text=The%20key%20inputs%20to%20the,or%20otherwise%20improve%20the%20organization .