Quality Assurance: Planning is Valuable
There are two ways to perform quality assurance (QA). One is to move a PCB through design, fabrication, and assembly focusing on expediting the project, but leaving QA at the end of the process. Time is definitely saved by placing QA as an afterthought, but too much of the process is left questionable.
The second, better way is to apply QA in small, thought-out, and incremental steps throughout the product build cycle process. This makes the various major steps and processes measured and repeatable. Embedded QA at various process locations tells you how yields likely will be at the final stage. Performing first article check at multiple stages creates fewer surprises at the end of the product build. The first approach is fraught with numerous potential issues.