Ch. 13
Designers should look at older designs to get inspiration. There are many designers that have probably attempted any idea you have had in the past. For this reason it is good to look at older designs for products similar to yours. Exemplars are a good reference for this. They will have valuable input for product designs and can help avoid pitfalls.
Ch. 14
The problem with most projects is that they are not designing the thing wrong. They are designing the wrong thing. There are situations where exemplars can hurt a design. When there are too many over-qualified people working on a project it can get too complex. Solutions can be found by looking at other projects, even if they are not similar.
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