In the realm of mechanical engineering and manufacturing, the terms "fabricated" and "machined" often cause confusion. This article aims to clarify the differences between fabrication and machining, especially in the context of customized machining. By exploring the processes, characteristics, and applications of each, we will help readers understand which option might be more suitable for their specific needs. We will also delve into the advantages of customized machining and present real-world industry examples and data to support our insights.