Kano Model
Classifies features as basic, performance, or delighters by their effect on customer satisfaction.
The Kano Model, developed by Noriaki Kano and colleagues at Tokyo University of Science in the late 1970s and presented in their 1984 paper 'Attractive Quality and Must-Be Quality', classifies product features by their non-linear effect on customer satisfaction. Five categories distinguish: Must-Be (basic) quality (taken for granted when present, severely dissatisfying when absent — e.g., car brakes that work); One-Dimensional (performance) quality (satisfaction proportional to performance level — e.g., fuel economy); Attractive (delighter) quality (presence delights, absence does not dissatisfy — e.g., heated seats when novel); Indifferent quality (no effect either way); and Reverse quality (presence dissatisfies). The framework's distinctive contribution is the predicted lifecycle in which today's delighters become tomorrow's performance and eventually basic features as customer expectations rise. Kano questionnaires use functional and dysfunctional question pairs to classify features empirically.
Core components
- Five quality categories: Must-Be, One-Dimensional, Attractive, Indifferent, Reverse
- Functional/dysfunctional question-pair survey methodology
- Lifecycle progression (delighters become performance, performance becomes basic)
- Asymmetric satisfaction effects
- Customer Satisfaction Coefficient calculation
Primary use case
Product feature prioritization in product management and quality function deployment; structuring customer-research instruments to classify feature importance; teaching tool for understanding non-linear satisfaction dynamics; complement to other prioritization methods like RICE.
Common criticisms
- Functional/dysfunctional question pairs can confuse respondents and produce ambiguous classifications
- classification stability across customer segments often weak
- lifecycle prediction (delighter → performance → basic) is descriptive rather than precisely timed
- static snapshot of evolving customer expectations
- questionnaire design and translation issues affect international application
- some categories (Indifferent, Reverse) are operationally less actionable
- cultural variation in basic-vs-delighter perception underweighted.
Lineage
- Siblings
- RICE Scoring, ICE Scoring, Jobs to Be Done