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Electronics manufacturing services

Electronic manufacturing services (EMS) is a term used for companies that design, test, manufacture, distribute, and provide return/repair services for electronic components and assemblies for original equipment manufacturers (OEMs). The concept is also referred to as electronic contract manufacturing (ECM).[1]

Contents

History

SCI (then Space Craft Inc.; now Sanmina-SCI) is generally credited for being the first major EMS / contract assembly company in North America.[2]

The EMS industry took off after the late 1970s when Solectron was established. At the time, most electronics manufacturing for large-scale product runs was handled by in-house assembly. These new companies offered flexibility and eased human resources issues for smaller companies doing limited runs. The business model for the EMS industry is to specialize in large economies of scale in manufacturing, raw materials procurement and pooling together resources, industrial design expertises as well as create added value services such as warranty and repairs. This frees up the customer who does not need to manufacture and keep huge inventories of products. Therefore they can respond to sudden spikes in demand more quickly and efficiently.[3]

The development of Surface Mount Technology (SMT) on printed circuit boards (PCB) allowed for the rapid assembly of electronics. The early 1990s saw OEM's rapidly installing SMT lines. EMS players like SCI and Avex struggled to exist as OEMs would pull contract or change vendors constantly. By the mid-1990s the advantages of the EMS concept became compelling and OEMs began outsourcing pcb assembly (PCBA) in large scale. By the end of the 1990s and early 2000s many OEMs sold their assembly plants to EMS aggressively vying for market share. A wave of consolidation followed, as the more cash-flush firms were able to quickly buy up both existing plants as well as smaller EMS companies. Within a few years (or less) many EMS found themselves owning empty factories as OEMs cut production, went out of business and changed suppliers.

Market Segments

The EMS industry is commonly divided into Tiers by their revenue:

  • Tier 1: >$800m/1Billion - examples include Foxconn/HonHai (about $50B) (of the famed iPod city scandal), Flextronics (about $35B), Jabil, Benchmark Electronics, and Sanmina-SCI
  • Tier 2: $250/300m to $1B
  • Tier 3: <$250m

There is no hard rule on the actual revenue designation at this time. Other categories have been suggested by StepBeyond/EMSinsider: Tier 4 <10m and "Tier Mega" referring to the Big 2, Foxconn and Flextronics.

Another distinction is drawn between EMS that specialize in High Mix Low Volume (HMLV) and High Volume Low Mix (HVLM). Mix refers generally to the complexity or different models of the pcb assembly. Volume refers the number of units built, with products like consumer electronics on the high end and prototype, medical electronics or machinery on the low end. Typically, lower Tier EMS provide HMLV and higher Tier provide HVLM.

Today the market is dominated by a handful of companies[4] such as Hon Hai Precision Industries (Foxconn), Flextronics,CelesticaSanmina-SCIJabilElcoteq, Onyx EMS, Benchmark ElectronicsPlexusKimball Electronics Group, Key Tronic Corp, Asteelflash and a few dozen others, several thousand smaller companies continue to occupy EMS niches.

During technology's late-1990s heyday, EMS players routinely acquired assets in high-cost locations. EMS players largely focused on printed circuit board fabrication, leaving system assembly to the OEMs. EMS companies largely disdained industries outside the world of information processing (computers) and communications. In recent years, EMS players have shifted production to low-cost geographies; embraced non-traditional industries including consumer electronics, industrial, medical and instrumentation; and added substantial vertical capabilities, stretching from design and ODM through system assembly, test, delivery and logistics, warranty and repair, network services, software and silicon design, and customer service.

EMS have also started to provide design services used in conceptual product development advice and mechanical, electrical and software design assistance. Testing services perform in-circuit, functional, environmental, agency compliance, and analytical laboratory testing. Electronic manufacturing services are located throughout the world. They vary in terms of production capabilities and comply with various quality standards and regulatory requirements.

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