机械设计贯穿设计、制造、使用，维护的整个过程，设计时的疏忽总会在这些方面反映出来，成功与否是很容易判断的。设计的过程中，受制造的影响很大，亦就是说好的设计是不能脱离制造的，对制造越了解，越有助于提高设计水平。
Mechanical design runs through the whole process of design, manufacture, use and maintenance. The negligence in design is always reflected in these aspects. It is easy to judge whether it is successful or not. In the process of design, it is greatly influenced by manufacturing, that is to say, good design cannot be separated from manufacturing. The more understanding of manufacturing, the more helpful to improve the design level.