Häufig gestellte Fragen
What distinguishes an EMS ERP from a classic manufacturing ERP?
An EMS provider (Electronics Manufacturing Service) produces assemblies on behalf of other manufacturers, usually based on customer-supplied bills of materials, CAD data and, in some cases, consigned components. The ERP must therefore operate in a strongly contract- and order-oriented way and keep customers' intellectual property (designs, process parameters) strictly segregated from one another. Unlike a classic series-production ERP that manages its own product portfolio, an EMS operation earns its margin on the service rather than on the material, which is why concurrent order costing and cost engineering are particularly important. The specific setup also depends on manufacturing depth, batch sizes (high-mix low-volume versus high volume) and industry focus.
Which IPC standards play a role in electronics manufacturing?
Central are IPC-A-610 (Acceptability of Electronic Assemblies) for the acceptance criteria of assembled printed circuit boards and IPC/WHMA-A-620 for cable and wire harness assembly. Frequently added are the soldering standard J-STD-001, IPC-7711/7721 for repair and rework, and IPC-7351 for land patterns in PCB design. These standards are generally not a legal requirement, but they are contractually demanded by OEM customers and must be embedded as qualification and inspection requirements in work instructions and test records. An ERP or MES system should document the associated quality records in an audit-proof manner so that the required proof of conformity is available without gaps.
How does an ERP support component traceability and lot tracking?
In electronics manufacturing it must be traceable which component batch went into which production lot and thus into which end product. In the event of a defect, affected end devices can be narrowed down more quickly, which is decisive for safety-critical assemblies in automotive or medical technology. To achieve this, the ERP links lot and serial numbers with the bill of materials, placement (SMD and THT), test steps (AOI, SPI, ICT, X-ray) and shipping into a continuous track-and-trace chain. How deep this traceability must go depends on customer requirements and industry, ranging from pure lot tracking down to the component serial number.
Which compliance obligations must an electronics manufacturer map in the ERP?
On the product side, the most relevant are the RoHS Directive restricting hazardous substances in electrical and electronic equipment and the REACH Regulation with its SVHC substances (substances of very high concern), whose conformity is evidenced via manufacturer data sheets in the ERP. For the metals used, the EU Conflict Minerals Regulation (EU) 2017/821 applies, which since 2021 has imposed due-diligence obligations above certain volume thresholds for the sourcing of tin, tantalum, tungsten and gold (3TG) from conflict-affected and high-risk areas. Depending on company size, due-diligence obligations from the German Supply Chain Due Diligence Act (LkSG) and the EU supply chain directive CSDDD are added, although their application is still being phased in via transition periods and the Omnibus package. Which obligations specifically apply depends on the size class, revenue and supply chain structure of the individual business.
Why is connecting ERP, MES and SMT machines important?
The ERP plans orders, material and deadlines, while the MES (Manufacturing Execution System) controls execution on the shop floor and connects the machines of the SMT line as well as inspection systems such as AOI and SPI. Via machine data collection, run times, downtimes, scrap and test results flow back into the ERP, making planned versus actual hours, material consumption and margins per order transparent. For vendor-independent networking, open IPC standards such as IPC-2591 (CFX) for machine communication and IPC-Hermes-9852 for line handover have become established. The result is a continuous data flow that shortens quality control loops and makes component-level traceability practicable in the first place.
How does an EMS ERP deal with component obsolescence and supply shortages?
Electronic components pass through lifecycles with statuses such as Active, NRND (Not Recommended for New Designs) and EOL (End of Life), with discontinuations usually announced several months to as much as one to two years in advance. A capable ERP holds this lifecycle data in the master data, works with Approved Vendor and Approved Manufacturer Lists (AVL/AML) and can plan approved alternative components in the event of shortages. External data services such as SiliconExpert, Octopart or Z2Data supply up-to-date availability and lifecycle feeds that are imported into the system. In addition, moisture sensitivity (MSL per J-STD-020/033) must be taken into account so that the floor life and dry storage of moisture-sensitive components are correctly monitored.