How a product is made and at what scale has a massive impact on the actual geometry of the product at both the component level and the assembly level. At the component level, there are many nuances for each different type of manufacturing process such as plastic injection molding, sheet metal manufacturing, castings, and machining. Design for manufacturing takes these nuances into consideration and optimizes the design so that it can be achieved.
“Graphics of a bracket that is to be made with sheet metal vs plastic injection vs machining”