Diagnostic question
Must-have or delighter
Classifies planned features for the segment that loves the product before they are built.
Value
Plain label: feature classification question
For each feature you plan, would that segment see it as a must-have, more-is-better, a delighter, irrelevant, or something some of them dislike?
Sources
Attractive quality and must-be quality · Kano, Seraku, Takahashi and Tsuji, Journal of the Japanese Society for Quality Control, 1984
Evidence grade C. Limited evidence: few or small studies.
Source IDs: F19
Book content is paraphrased, never quoted at length. Last verified October 24, 2026.
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