Attribute dependency in action

So let's apply the attribute dependency technique…to a common household appliance, a refrigerator.…The first step is to create your matrix.…You list the internal attributes…of the product or service.…You also list the external variables…around the product or service,…those things within the closed world…that vary about how and why the product is used.…Be sure to include both time and price…somewhere in your list.…You place these attributes in your matrix.…Internal and external along the left side…and internal attributes across the top.…

Next you X out those cells of the matrix…that are redundant or have only one variable.…You're ready to go.…Let's try a few of these.…Let's start with two internal variables.…How about cell C8?…You have the variables shape and number of doors.…The first question you ask yourself is this.…Is there a dependency now…in how refrigerators operate…between its shape and the number of doors?…In other words,…as the shape of the refrigerator changes,…the number of doors change.…

I can't think of any refrigerators…