Kano Questionnaire

The Kano questionnaire determines which category of the Kano model a requirement falls into. Each attribute is asked in two opposing forms:

• Functional question — "How do you feel if the attribute is present?"
• Dysfunctional question — "How do you feel if it is absent?"

Both are answered on the same five-point scale (from I like it to I dislike it). Only the combination yields the category: agreement with "present" alone cannot distinguish whether the attribute delights or is simply taken for granted — that shows only in the reaction to its absence. The mapping uses a fixed evaluation table; an item's category is the modal value across respondents.

The same counts produce two coefficients after Berger: