How EMS providers are chosen
A company outsourcing assembly evaluates placement capability, minimum component size, board dimensions, testing options, component sourcing support, certifications and the volume range you accept. Prototype customers and volume customers need different answers, and a single page describing modern equipment answers neither. The result is that work goes abroad to providers who published a capability matrix.
What we build for an electronics assembler
First, line capability: placement rates, component sizes, board dimensions, soldering processes — the matrix an engineer checks. Second, testing and inspection options, since that determines whether you can serve regulated or safety-critical work. Third, component sourcing support, which is often the real reason a customer outsources at all. Fourth, separate prototype and volume routes, because those buyers have opposite priorities and should not share a page: one is iterating a design under time pressure, the other is committing to a production run and needs certifications, capacity and consistency evidence before anything else.