To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyses reviews to verify trustworthiness.
As engineers, technologists have a habit of looking through the lense of the "function". Maeda encourages more than a sideways look through the lense of the "form" of an application/device/process. With simple examples and down to earth anecdotes drawn from relevant personal experience, this quick read is thought provoking and backed up by online content for those interested enough to go looking.