By Layne Shumaker

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Component advantages
In addition to the assembly advantages, some component suppliers have assembly capabilities. This relationship creates some unique benefits. Those suppliers who have a reputation for supplying high-reliability components have an understanding of what the components will be subjected to in their application. This expertise demon strates a clear understanding of the processes and process controls necessary to deliver high-reliability circuit card assemblies. Looking for an outsource partner who provides assembly services and high-reliability parts can also minimize handling which is a very big concern when reviewed against long-term reliability and the high cost of these materials. The component supplier providing his own parts for assembly reduces the potential for damage from handling. Other cost advantages, such as reduced pricing, may be something the supplier may be willing to discuss.
Aside from the obvious reasons, there are times when it does not make good sense to go to an outside assembly house. Here are a few things to consider:

• in-house assembly capability and the time to perform the assembly task;
• the selection, certification, and qualification of an outsource candidate;
  
• new technology or processes unique to the particular design that may be a significant factor;
  
• whether the quantity of assemblies justifies the amount of support required to outsource (a big factor if the assembly can be easily assembled by hand and non-recurring dollars can be avoided);
  
• whether another supplier successfully assembled the circuit card;
  
• whether the potential for repeat business has been assessed to ensure that all of the cost factors have been reduced;
  
• what the partner brings to the relasupplier have certifications from more tionship;
  
• quality of the documentation package so the supplier can deliver product and be successful;
  
• whether the design is far enough along to prevent multiple non-recurring activities, thus avoiding increased costs; and the existence of established communications and processes in place to provide immediate feedback.
  
• When selecting an outside contract manufacturer, it is important to view the relationship as a partnership. This can be more important than the delivery of product, at least for the first time.
  Layne Shumaker is director-CCA operations at Aeroflex UTMC in Colorado Springs, Colo.