Systems not behaving as expected, slow performance, infrastructure failure etc.

Level 0: ITSM/ORR

Level 2 (Main Category)	Level 3 (Subcategory)
Access	User rights
Access	Logging in
Connectivity	Slow/unresponsive/not working
Documentation	Upload/download error
Information/Data	Incorrect/inconsistent
System	Slow Performance
System	Functionality/service unavailable
System	User interface
System	Integration
System	IT hardware failures
Systems security	Vulnerability (i.e., patching outdated)
Systems security	Hacking
Systems security	Phishing
Systems security	Ransomware/Malware
Systems security	Data leak
Systems security	Data breach
Information/Data	Import error
Information/Data	Upload error/download error
Information/Data	Data mismanagement
Information/Data	Data leak
System	Software failures
System	Utility outage/disruptions
Systems security	Social engineering