Smoothing the Layout to Test Flow
Putting these two under one roof provides OEMs greater assurances the end-product is successfully tested and avoids unforeseen problems.
PCB layout and test are inextricably intertwined. Some contract manufacturers maintain an in-house staff of layout designers, as well as assembly/test engineers. In such cases, the layout engineer delays creating all the necessary test points to avoid hindering routing. But once they finish critical routing and bus routing, an initial routing analysis and preliminary test points to achieve, say 50 or 60% coverage, they have the benefit of consulting with in-house test engineering to determine the right strategy to increase test coverage for the product.