Which describes an unresolved problem which has been already analysed?

A known error is a problem that has been analysed but not resolved1. This means that the root cause of the problem has been identified, but a permanent solution has not been implemented yet2. A known error can be recorded in a known error database (KEDB) and linked to related incidents and problems3. References: ITIL Foundation - ITIL 4 Edition, page 15; ITIL® 4 – A Pocket Guide, page 35; ITIL® 4 Practice Guide: Problem Management, page 8.