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Requirements are more than just on or off!

The Kano Model is a tool to help categorize product requirements.  The model created by Professor Kano groups all requirements into five categories:

  1. Must-be Quality, also known as basic needs,
  2. One-dimensional Quality, also known as performance attributes,
  3. Attractive Quality, also known as delighters,
  4. Indifferent Quality (neither improve or detract from satisfaction), and
  5. Reverse Quality (reduce satisfaction when achieved).

Most typical implementations of the Kano model tend to focus on the first three areas.   (more…)