Here are ten innovations for the iPhone that I would love to see. I created these using the Attribute Dependency tool. It is the most powerful of the five tools of Systematic Inventive Thinking, but also the most difficult to learn. To use Attribute Dependency, we start by making two lists. The first is a list of internal attributes of the iPhone. The second is a list of external attributes - those factors that are not under the control of the manufacturer (Apple, in this case), but that vary in the context of how the product or service is used. Then we create a matrix with the internal and external attributes on one axis, and the internal attributes only on the other axis. This matrix forces the combinations of internal-to-internal and internal-to-external attributes that we will use to innovate.