Low price vs. a cost-effective decision

Why the cheapest PCB price isn’t always the most cost-effective decision

For developers, procurement staff and technical decision-makers, assessing PCB costs is a cross-functional task. A seemingly low-cost quote can lead to additional costs later on: due to queries, rework, delays, non-comparable quotation criteria or unstable mass production processes. A printed circuit board is only cost-effective when technical requirements, manufacturability, testing requirements, availability and logistics are considered together.

The price of a printed circuit board is determined long before the order is placed


Many cost-related decisions are made as early as the layout, stack-up and specification stages. The number of layers, material, copper thickness, surface finish, drill holes, tolerances, impedance requirements, milling operations or special tests all have a significant impact on manufacturing costs. Not every specification is wrong simply because it incurs costs. A higher copper thickness may be necessary for thermal or electrical reasons; a defined impedance may be crucial for signal integrity; and a particular surface finish may be justified by storage requirements, the soldering process or component requirements.

Cost drivers often arise where specifications are adopted without being reviewed.

Problems arise when requirements have evolved over time and no longer suit the specific application. If, for example, a special material is specified even though a standard material would reliably meet the requirements, it is not just the material costs that rise. Availability, lead times, approval of alternatives and the comparability of quotations also become more difficult. Conversely, an overly simplistic approach to materials can later lead to risks relating to complaints, service life or quality. The most cost-effective solution therefore rarely lies at either extreme: neither in the most stringent specification nor in the cheapest design that is technically just about feasible.
Assessing materials, availability and testing requirements correctly
PCB quotations are only comparable if they are based on the same assumptions. Two quotations may look similar on paper yet still offer different levels of service: different base material, different surface finish, different level of testing, different tolerance specifications, different packaging, different delivery method or different documentation. For the procurement department, this is a classic risk, because the lowest price appears attractive but can turn out to be more expensive later on if important details are missing or need to be clarified at a later stage.
 

• Technical specifications: Critical characteristics such as material, Tg, CTI, copper layout, impedance, surface finish and tolerances should be clearly described and not unnecessarily restricted. 
• Quality assurance: Electrical testing, initial sample inspection, test reports, dimensional checks or special tests should be commensurate with the application risk, the quantity and the project phase.
• Procurement and logistics: Alternative materials, packaging, labelling, delivery route, revision, batch and call-off model must be taken into account at an early stage.
If these points are clearly defined in the enquiry, quotations become more comparable and suppliers can provide realistic quotes. At the same time, this reduces the risk of queries during the CAM process, misunderstandings during production or delays in goods receipt.
 

Cost-effective PCB procurement requires technical clarification

A DRC or CAM check is not a mere formality, but an important step towards cost control. Gerber data may be formally complete yet still leave questions unanswered: Is the outline unambiguous? Can milled areas, slots and drill holes be interpreted correctly? Do the copper clearances from the edge comply with specifications? Is the stack-up plausible for the intended application? Are the tolerances realistic? The sooner such issues are clarified, the lower the risk of queries, rework or manufacturing problems in prototypes, small-batch production and mass production.

EVYTRA’s recommendation:

Do not view PCB costs in isolation as a unit price, but rather as the result of technical specifications, manufacturability, material availability, testing strategy and delivery model. Development, procurement and quality assurance should work together at an early stage to determine which requirements are functionally essential, which specifications can be adapted, and what evidence is genuinely required for goods receipt and the mass production process.

EVYTRA provides support precisely at this interface: from requirements analysis through the verification of Gerber data by DRC and CAM specialists, right through to dimensional and tolerance checks, technical coordination, quality assurance, and logistics and packaging solutions tailored to the project. The aim is not to produce the most complex PCB possible, but rather a technically reliable, economically viable and sustainably sourceable solution.

Assessing PCB costs holistically
Those who base their decision on the PCB price solely on the lowest unit price often overlook subsequent costs. EVYTRA helps to combine technical requirements, quality and procurement in such a way that your PCB remains cost-effective throughout the entire process.