The Advantage for turnkey PCB Assembly Manufacturing?

A PCB Turnkey operation is an organization which can perform turnkey delivery of PCB assemblies.
That means, you supply them all the documentation - PCB gerber files (artwork in digital format), drill drawings, solder masks, solder silk screens, component placement files with X-Y locations, and a complete annotated BOM with component designators matching the component placement files and any special assembly instructions.
They will order the parts, have the blank boards fabricated and do the SMT automation setup (or manual routing if chosen) and place the parts, solder, and even do any testing procedure you have provided them. At a agreed upon price and date they will ship you your assembled and inspected boards.
Basically they will quote you a fixed price for a lot of however many you want and it can even be just one (with a rather high cost for setups) or a large amount for which they may develop sophisticated fixturing to achieve high production efficiency.
Basically you turn the key (or dial the phone) and they do the rest.
Its typical that automated assembly of boards yields quality consistent assembly with no placement errors and you get 90% or higher success for first turn on, assuming your PCB board design is perfect.
Turnkey PCB assembly manufacturers are experts in the complex set of processes required to produce low-cost and high quality PCBs with fast turn times. PCB assembly processes include PCB fabrication, component placement, soldering the components to the board and testing the boards to ensure they are fully functional. Due to the complexity of PCB assembly the cost of owning an assembly facility is significant. This is why there are important advantages for an OEM to outsource its PCB assembly needs to a turnkey manufacturer.
Decades ago,it was common for a company to produce its own PCBs. But this approach uses valuable in-house resources and usually increases the price of its products. Even if a company were to decide to build a PCB assembly facility, the cost of setting up the facility would be very expensive. In order to reap cost savings, companies today generally choose to outsource PCB assembly services to a turnkey PCB assembly house. Doing so eliminates the capital costs of real estate, machinery, and production staff required for building and operating a PCB assembly facility. These added costs can negatively affect the profits of the company.
By leveraging the high production capabilities of a turnkey PCB assembly service solution that can assemble many PCBs for a very low price per board, cost savings can be passed down to customers. These cost savings also reduce the time for design and development and eliminate unnecessary rework, which provides additional cost savings. Furthermore, huge savings can be reaped by outsourcing PCB assembly processes, including choosing processes, handling inventory, and maintaining product quality. Outsourcing PCB assembly manufacturing to a high quality turnkey PCB assembly house makes good sense.

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