Explanation
Think and work holistically
No service, practice, process, department, or supplier stands alone. The outputs that the organization delivers to itself, its customers, and other stakeholders will suffer unless it works in an integrated way to handle its activities as a whole, rather than as separate parts.
https://www.bmc.com/blogs/itil-guiding-principles/#:~:text=5.,rather%20than%20as%20separate%20parts.

Explanation
"The purpose of the improve value chain activity is to ensure continual improvement of products, services, and practices across all value chain activities and the four dimensions of service management."
https://www.symphonysummit.com/products/defining-industry-terms-itsm-itil-itil4/#:~:text=Improve%20%E2%