Table 2.

Rating scale used to rate the severity of usability problems

Problem	Severity	Description
No problem	0	I don’t agree that this is a usability problem at all
Cosmetic	1	Need not be fixed unless extra time is available on project
Minor	2	Fixing this should be given low priority
Major	3	Important to fix, so should be given high priority
Catastrophe	4	Imperative to fix this before product can be released