Often times you read about cars, watches, engines, speakers, and different sort of materials which boasts of having been engineered to perfection. Taking into consideration all the factors that could possibly influenced the strength and quality of a certain product.
Take for example a chair. The engineers would have calculated the number of times on average a person would sit on it. He would then have to calculate the specifications of the material used. How much weight could it stand at any given time, how much does it expand when it's hot, how does the material composition changes in different temperature. So many things are taken into account before a chair is put on sale (considering you're buying it from a established company).
It's nice to read about all these claims, having them say that thing have been engineered to perfection, having calculated everything. But often times, those calculations are awfully tedious.
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