WHILETHERE IS great debate in the quality community as to who first made the observation that visual inspection by humans is not 100% effective (both W. Edwards Deming and Dr. Joseph M. Juran have been given credit) and even some debate about the true effectiveness rate (is it 75%? 80%? 85%?), all agree it is inefficient and error-prone. Yet, automated optical inspection is often deemed not-cost-effective for relatively simple processes in many factories. One area that is often problematic for electronics manufacturing services providers is odd-form part through-hole insertion. Through-hole odd-form parts continue to be used when a part's weight or need for a more robust solder joint makes that level of interconnection more reliable. Transformers, large capacitors, diodes, relays, connectors and pressure sensors are few examples of parts that are often still packaged as through-hole. Manual assembly, like manual inspection, is prone to variation and associated defects, particularly issues such as misaligned parts, missing parts or wrong parts. Odd-form parts are typically of a size or shape that makes automated insertion methods impractical.
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机译：WHILETHERE在质量界引起了很大的争议，即谁首先观察到人的视觉检查并非100％有效（W. Edwards Deming和Joseph M. Juran博士都受到赞誉），甚至有人对真相进行了辩论。有效率（是75％还是80％还是85％？），所有人都认为它效率低下且容易出错。但是，在许多工厂中，相对简单的过程通常都认为自动光学检查不具成本效益。电子制造服务提供商经常遇到的一个问题是奇形零件通孔插入。当零件的重量或需要更坚固的焊点使互连水平更加可靠时，将继续使用通孔奇形零件。变压器，大型电容器，二极管，继电器，连接器和压力传感器仅是少量零件的示例，而这些零件通常仍被封装为通孔。像手工检查一样，手工组装容易产生变化和相关的缺陷，特别是零件未对准，零件缺失或零件错误等问题。奇形零件的尺寸或形状通常使自动插入方法不可行。
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