So, I got this question about what kind of principles did we follow when introducing this thing called DevOps. I have destilled the principles here.
They are somewhat based / inspired by a Gavin Davies blogpost.

Whole Product Focus

• Customer is interested in continuous value (less of negative one – issues, and more of positive one – features), not development vs. support
• Product is finished when it is retired from production

No Silos

• Team that delivers customer value has capability for development and support
• Cross-functional and cross-component team owns the product and has full responsibility for everything related to the product
• Team defines and continuously improves working agreements regarding development vs. operations

Automated feedback

• Before production – highest quality and early discovery of problems
• In production – built for fast analysis, resolution and low impact (not roll-back)
• Development in service of operations (built for easy operations), operations in service of development (root cause data to solve and prevent repetition)

Perfection goals

• Product runs itself, doesn’t require support
• Deployment is instant
• All issues discovered and solved before production
• Every team member does both operations and development

Happy to hear any feedback.