"must be", "must-have"

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Kano 模式（Kano Method 或 Kano Model）： 魅力的品質、 應該具備的品質（日文：当たり前品質；英文："must be quality" ）；魅力的品質創造等等....

中原大學頒贈 狩野紀昭教授榮譽工學博士學位 典禮 / 粗初見Bill Scherkenbach

The Kano model is a theory of product development developed in the 80's by Professor Noriaki Kano which classifies customer preferences into five categories:

• Attractive
• One-Dimensional
• Must-Be
• Indifferent
• Reverse