Which of the following are sources of best practice? 1. Academic research 2. Internal experience 3. Industry practices

ITIL defines best practice as what has proven to work in practice across diverse environments, drawing from academic research that provides theoretical grounding, internal experience that captures organizational learning, and industry practices that reflect collective real-world wisdom. No single source is sufficient on its own, so all three contribute to a robust best practice framework.

This excludes internal experience, which is a valid and important source - organizations develop unique knowledge through operational history that qualifies as best practice input.

This excludes industry practices, which represent aggregated learning from peer organizations and are a primary source recognized by ITIL.

This excludes academic research, which provides evidence-based theoretical foundations that inform and validate best practices.