A design choice describes the planned way to satisfy an engineering development requirement in a way that could be satisfied differently.
Often, there are multiple ways to satisfy a requirement, which necessitates making choices to select from possible design options.
Selection is often based on financial considerations, often resulting in the least expensive option.
A suspension bridge, for example, uses the fact that steel is extremely efficient in tension, while a prestressed concrete bridge takes advantage of concrete's relatively low cost by weight and its ability to sustain high compressive loading (see compression).
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