By classifying features into five categories, designers can meet basic needs and deliver delightful innovation without scaring off users.

1. Must-have

   Must have features are the minimum expected functionality; they are taken for granted. Users will not be excited if they are present, but disappointed if they are absent.
   
   

2. One-dimensional

   One-dimensional features are received differently depending on how fully (or well) they are implemented. Users will be excited if they are implemented well, and disappointed if they are not.
   
   

3. Attractive

   Attractive features are unexpected. Users will be excited if they are present, but not disappointed if they are absent.
   
   

4. Indifferent

   Indifferent features will neither excite nor disappoint users.
   
   

5. Reverse

   Reverse features are divisive; their reception depends on individual needs or desires. When present, some users will be excited, but others will be disappointed.

The model can also to be used to track the shift of features over time as innovative features become basic needs.