Where would all the possible service improvement opportunities be recorded?

The CSI register is a formal document or database maintained as part of Continual Service Improvement that records all identified improvement opportunities, their priority, associated benefits, and progress. It ensures that no improvement idea is lost and provides a structured way to evaluate, prioritise, and track improvements across all lifecycle stages.

The Known Error Database stores records of known errors and their workarounds, not improvement opportunities; it is owned by problem management.

The Capacity Management Information System holds capacity and performance data used for capacity planning, not for logging improvement opportunities.

The Configuration Management Database stores information about CIs and their relationships within the IT infrastructure, not improvement opportunities.