Applying Human Factors Engineering Methods for Risk Assessment of a Neonatal Incubator

Table 2

Severity rating scale.

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(0) Not a usability problem at all

(1) Cosmetic problem only. Need not be fixed unless extra time is available

(2) Minor usability problem. Fixing this should be given low priority

(3) Major usability problem. Important to fix. Should be given high priority

(4) Usability catastrophe. Imperative to fix this before product can be released

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Source: adapted from Zhang et al. [13].