What are the potential challenges in applying the Kano model in product development?

The Lean Product Playbook" has significantly influenced the way companies prioritize their product development needs by introducing the Kano model. This model categorizes customer needs into three types: Must-haves, Performance needs, and Delighters. According to the model, Must-have needs should be met first, followed by Performance needs, and finally Delighters. This hierarchical approach helps companies better prioritize their product development efforts and create a product that stands out in the market.

Apple's iPhone is a great example of a product that has successfully used the Kano model. When first introduced, features like a touch screen and app store were delighters. Over time, these features became performance needs and then must-haves as competition increased. Another example is the Amazon Kindle. Its e-ink technology was initially a delighter, but as more e-readers entered the market, it became a performance need and eventually a must-have.