What is electronics manufacturing?
Electronics manufacturing is the production of assembled printed circuit boards and the devices built from them. A bare board, the components and the manufacturing data set become a tested, working assembly. At its core is placement in SMD and THT technology. Before that comes work preparation with material planning and setup planning; after it come soldering, testing and, depending on the product, final assembly, programming and functional test.
The process chain of an assembled board
For an SMD assembly the chain runs in this order: print solder paste onto the pads through a stencil, place the components with the pick-and-place machine, solder in the reflow oven to a defined temperature profile. Leaded parts follow and are soldered by wave or selective soldering. At the end come cleaning, automated optical inspection (AOI), an X-ray check where joints sit hidden under BGAs, then electrical test and functional test. Every one of those steps costs machine time and shapes the price of the assembly, not just the purchase price of the components.
In-house production or an EMS provider
An in-house line requires at minimum a stencil printer, a pick-and-place machine, a reflow oven and optical inspection, plus people for work preparation and setup. That only pays off above a certain utilisation. Anyone below it, or with strongly varying volumes, hands manufacturing to an EMS provider who brings the machine park, the process knowledge and the purchasing volume. Many manufacturers run both: prototypes and small batches in house, series production outside.
What drives cost in electronics manufacturing
The material share is the visible part, the manufacturing share the underestimated one. Three quantities drive it above all: the number of placements per assembly, the setup effort and the batch size. Setup is not counted in articles but in feeder lanes: a component on wide tape occupies several 8 mm lanes, and a placement machine has a limited number of them. If a bill of materials does not fit into one setup, the line has to be changed over mid-run, and every feeder swap costs minutes of downtime. At small batch sizes the setup share can exceed the material share.
Electronics manufacturing, EMS and contract manufacturing
The three terms are often used interchangeably but do not mean the same thing. Electronics manufacturing names the activity, regardless of who performs it. EMS stands for Electronics Manufacturing Services and names the business model: manufacturing on behalf of an external client and to that client's design. Contract manufacturing is the wider term and is not limited to electronics. A company that assembles its own devices does electronics manufacturing but is not an EMS provider.
Where this shows up in PCBoffer
PCBoffer recalculates the manufacturing side instead of estimating it. From ODB++ or Gerber data and the pick-and-place data it derives the placements, the setup and the process steps required, and prices them against the machine park that actually stands in that plant: placement rate per machine, feeder lanes, oven profiles, test steps. What comes out is manufacturing cost with a traceable origin instead of a flat surcharge per component.
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