When you send us an inquiry for industrial control PCB assembly, the first question we ask is not about price. It is about the operating environment of the final product. Will the board sit inside a sealed cabinet next to a variable frequency drive? Or will it be exposed to vibration on a production line? That answer changes component selection, conformal coating, and test strategy. We write this article to show you exactly how our quotation process works, so you can compare supplier responses with confidence.
We are Informic, an electronics solution provider based in Europe. We coordinate turnkey PCBA projects for companies that build industrial controls, automation systems, and monitoring equipment. Our role is to manage the entire manufacturing chain, from component sourcing to final functional testing. This article explains the practical steps we take to turn your BOM and Gerber files into a clear, actionable quotation.
What a clear quotation for industrial control PCBA actually contains
A useful quotation is more than a unit price. It is a risk assessment document. When we prepare a quote for industrial control PCB assembly, we break it into four sections: materials, manufacturing, testing, and logistics. Each section carries specific assumptions that you should verify before placing an order.
Technical reference: For related engineering context, see IPC standards and industry resources.
For example, the materials section lists the exact component part numbers, manufacturers, and quantities. We also state whether we are quoting against your approved vendor list or using our preferred equivalents. This matters because industrial control boards often use long-lifecycle components. A quote that substitutes a cheaper capacitor without telling you could create a reliability problem in five years.
We also separate the cost of the bare printed circuit board from the assembly cost. Many buyers miss this distinction. The bare board price depends on layer count, copper weight, surface finish, and minimum trace width. The assembly cost depends on component density, package types, and the number of unique parts. If a supplier gives you one lump sum, ask for the split. It helps you negotiate with your own panel builder later.
Finally, we state the lead time for components separately from the lead time for assembly and testing. Industrial control components, especially connectors and safety relays, often have long procurement cycles. If we quote a 12-week lead time, you need to know that eight of those weeks are for component sourcing, not for our production line.
Why DFM feedback is part of our quotation, not an afterthought
Design for manufacturability (DFM) is not a buzzword. It is a checklist we run on every industrial control PCBA project before we quote. We look for issues that will increase cost or delay delivery, and we report them to you in writing. Here are the three most common problems we find in industrial control designs.
First, component spacing. Industrial control boards often mix through-hole connectors with fine-pitch surface mount devices. If the through-hole components are placed too close to the SMD area, the wave soldering process can shadow the small parts. We recommend a minimum of 5 mm clearance between through-hole and SMD zones. If we see less than that, we will ask you to adjust the layout or we will propose a selective soldering process, which adds cost.
Second, test points. We need to verify that every net on your board is accessible for testing. If you have not included test points, we have to use a flying probe tester, which is slower and more expensive than a bed-of-nails fixture. For a production run of 500 boards, this difference can be significant. We will show you the exact locations where test points are missing and suggest where to add them.
Third, panelization. The way your boards are arrayed on a panel affects both cost and yield. We check whether your V-score lines or tab-routing paths intersect with critical traces or component footprints. We also verify that the panel size matches our standard rail width for the SMT line. If your panel is 5 mm too wide, we cannot run it on our standard equipment without a custom carrier.
We send this DFM report with your quotation, not after you place the order. That way, you can decide whether to revise the design or accept the additional process steps. The report is free, and it does not obligate you to buy.
How we handle BOM sourcing for industrial control components
Component sourcing is where most industrial control PCBA projects go wrong. The global supply chain for electronic components has been volatile for years. We do not pretend to have a magic solution. Instead, we use a transparent process that gives you options.
When we receive your BOM, we check each line item against three criteria: lifecycle status, availability, and compliance. We use our internal database and public distributor portals to verify that each part is not end-of-life. For industrial control boards, we pay special attention to parts that are approaching end-of-life but still have large installed bases. If you are designing a new product, we recommend avoiding those parts completely.
For availability, we check stock levels at multiple European distributors and at the manufacturer directly. We do not rely on a single source. If a part is on allocation, we tell you immediately and suggest an alternative that is pin-compatible and electrically equivalent. You make the final decision, but you make it with data.
Compliance is the third check. We verify that every component meets the EU RoHS and REACH requirements that apply to your target market. If your product is destined for a specific industry, such as food processing or medical devices, we also check for any additional restrictions. We do not claim to be a regulatory body, but we flag obvious issues before they become your problem.
Once we have this information, we prepare a sourcing plan. The plan shows you the lead time for every critical component, the quantity we need to order, and the risk level. If you have a preferred distributor, we will use them. If not, we use our established network of franchised distributors and manufacturers. We do not buy from brokers unless you explicitly approve it, because counterfeit risk is too high for industrial control applications.
Here is a simple table that shows how we categorize component risk in your BOM:
| Risk Level | Definition | Our Action |
|---|---|---|
| Low | Standard parts, multiple sources, stock available | Quote standard price and lead time |
| Medium | Single source or long lead time | Propose alternative, show price difference |
| High | Allocation, end-of-life, or custom parts | Request your approval before ordering |
What to include in your RFQ to get a faster, more accurate quote
You can speed up our quotation process by sending a complete RFQ package. Here is the list of files and information we need, in order of importance.
First, the BOM in Excel or CSV format. It must include reference designators, manufacturer part numbers, quantities, and your preferred manufacturers. If you have not selected a manufacturer for a part, leave it blank and we will suggest one. Do not send a PDF of the BOM, because we cannot easily extract the data.
Second, the Gerber files and drill files. These are the actual manufacturing data for the bare board. We need them in RS-274X format or ODB++ format. We also need the assembly drawing, which shows the component placement and polarity markings. If you have a pick-and-place file, send that too. It saves us time in programming the SMT line.
Third, the test requirements. Do you need a functional test, an in-circuit test, or both? What are the pass/fail criteria? If you have a test specification document, include it. If not, we will propose a standard test based on the complexity of your board.
Fourth, the volume and schedule. Tell us the total quantity you need and the delivery date you are targeting. We understand that industrial control projects often have phased deliveries. We can quote a framework agreement with multiple delivery dates.
Finally, tell us about your product environment. Is it a continuous operation device or an intermittent duty device? What is the maximum ambient temperature? Does the board need conformal coating? This information helps us recommend the right surface finish and protective treatments.
The testing and quality steps we include in every industrial control PCBA order
Testing is not an optional extra for industrial control boards. It is the difference between a reliable product and a field failure. We include three levels of testing in our standard quotation, and we explain each one so you know what you are paying for.
The first level is automated optical inspection (AOI). After the SMT soldering process, a camera system checks every component for correct placement, orientation, and solder joint quality. This catches most defects, but it cannot verify that the circuit actually works.
The second level is in-circuit testing (ICT). This uses a bed-of-nails fixture to contact test points on the board and verify that each component is present and correctly soldered. ICT checks for shorts, opens, and incorrect component values. It does not test the function of the board as a whole.
The third level is functional testing. We power up the board and run a test sequence that simulates the actual operating conditions. For industrial control boards, this often involves checking input voltages, output currents, and communication protocols. We build a custom test fixture for your board, and we keep it for the lifetime of the project.
We also perform a burn-in test if your application requires it. Burn-in runs the board at elevated temperature for a specified period to identify early failures. This is common for safety-critical industrial controls, but it adds time and cost. We will ask you if you need it, and we will explain the trade-off.
All test data is recorded and stored for each batch. If a field failure occurs, we can trace the test results back to the specific board and the specific test station. This traceability is essential for continuous improvement and for any warranty claims.
Logistics and after-sales support for European customers
We ship from our European production partners, which means we can offer short lead times for customers in the EU. We handle customs clearance and VAT documentation for cross-border shipments within the European Union. For customers outside the EU, we provide the necessary export documents and work with your freight forwarder.
After delivery, we keep the manufacturing files and test fixtures for at least two years. This means you can reorder the same board without re-engineering. If you need to make a design change, we can update the files and re-quote quickly. We also provide a warranty on our assembly workmanship, which covers defects in soldering and component placement. The warranty does not cover component failures caused by electrical stress or environmental factors outside the specified operating conditions.
We encourage you to ask questions during the quotation phase. A good supplier will not mind a detailed inquiry. In fact, we prefer it, because it means you understand what you are buying. If you are comparing quotes from multiple suppliers, use our breakdown as a checklist. Ask each supplier to provide the same level of detail, and you will find that the differences become very clear.
For more information about our bare board manufacturing capabilities, visit our pcbManufacturing page. To learn about our full turnkey assembly services, see our pcba page. If you need help selecting specific components for your industrial control design, our engineering team can assist. And when you are ready to discuss your project, use our quote form to send us your files.
Frequently asked questions about industrial control PCBA quotations
What is the typical turnaround time for a quotation?
We aim to send a complete quotation within three to five working days after receiving your BOM and Gerber files. If your design requires extensive DFM analysis or component sourcing research, we will inform you of the expected delay. For urgent requests, we offer a preliminary quotation within 48 hours based on the BOM alone, with a final price after the DFM review.
Do you charge for DFM feedback or design review?
No. The DFM review is part of our quotation service, and it is free of charge. We provide a written report with specific recommendations, and you are under no obligation to proceed with us. We do this because it reduces the risk of manufacturing errors and helps you get a more accurate price from any supplier.
Can you help with component selection if our BOM has obsolete parts?
Yes. If we identify obsolete or end-of-life components in your BOM, we will suggest alternative parts that are pin-compatible and electrically equivalent. We will provide datasheets and a comparison of key specifications so you can make an informed decision. If the alternative requires a minor board layout change, we will note that in the DFM report.
FAQ
What do we review first for industrial control pcb assembly?
We begin with the functional requirement, the current revision-controlled data package, critical components, expected volume, quality requirements, and delivery deadline.
How do we make purchasing risk easier to compare?
We compare date code, traceability, lead time, MOQ, substitute status, quality checks, and the supplier assumptions behind each quotation instead of comparing only a unit price.
What do we need for an accurate quotation?
We need the correct document revision and, where relevant, the BOM, Gerber or ODB++ files, centroid data, target quantity, application, test expectation, quality requirement, and requested delivery date.
