12. Prototyping the Requirements

in which we use simulations to help find requirements

One of your authors, Suzanne, recently bought a phone to replace one that had decided to stop working. Time was pressing—she was trying to catch a train to a client meeting—and as the brand of phone was known to her, the device never came out of the box before she produced a credit card, took delivery, and rushed to catch the 08:15 to Reading. Once settled into her seat on the train, she lifted the phone out of its box. The phone had all of the attributes advertised on the outside of the box, looked impressively smart, and functioned perfectly except for one thing: Several of the buttons were too small to use. Suzanne has average-sized hands and is quite ...

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