The Kano Model

Definition

The Kano Model sorts product attributes into three categories by how they affect customer satisfaction. Basics cause dissatisfaction if absent but generate no extra satisfaction if present — customers expect them silently. Performance attributes follow "the more, the better": satisfaction rises linearly with how much of the attribute is delivered. Delighters excite and differentiate, often addressing needs customers didn't know they had, and provide a real competitive edge. The model also makes a decay prediction: over time, delighters become ordinary performance attributes, and performance attributes become basics, as the whole market catches up.

In the Book

Pichler illustrates the three categories with a mobile phone: the ability to make calls is a basic (no calls, no sale — but customers don't notice or credit it working); how light the phone is and how quickly it starts up are performance attributes, where customers "cannot get enough" of incremental gains; an attractive design and the ability to personalize the phone are delighters. He connects the model back to the chapter's earlier material on the product vision: visions (like the SoundStation example that opens the chapter) tend to describe performance attributes and delighters, not basics — basics belong in the product backlog instead, assumed rather than sold. The decay prediction is offered as a reason products must keep shipping new delighters: today's delighter becomes tomorrow's performance attribute and eventually a basic that competitors all provide, so standing still erodes differentiation even without any change in the product itself.

Why It Matters

Not every improvement pays off the same way, and treating them as interchangeable "features" hides that. Distinguishing what merely avoids dissatisfaction, what scales your investment linearly, and what actually wins customers over lets you allocate limited effort correctly — and the decay prediction warns that whatever wins today is only temporary, regardless of domain: yesterday's delight is tomorrow's baseline expectation.