DPMO(defects per million opportunities，百万机会的缺陷数)计算提供一个将缺陷按照板的复杂程度规范化的方法。 对于这个度量，机会数等于零件(SMT或通孔)数加上焊接点数（只对元件，通路孔与测试点除外）。

2025年3月3日 · DPMO, also known as NPMO, is a Six Sigma metric used in quality management that stands for defects per million opportunities, whereas NPMO stands for nonconformities per million opportunities. It is a ratio of the number of defects in a sample to the number of defect opportunities multiplied by 1 million.

2021年2月2日 · dpmo（即：每百万次采样数的缺陷率）是指100万个机会里面,出现缺陷的机会是多少。这里有一个计算公式,即dpmo=（总的缺陷数/机会）×一百万分之一百万。 如果dpmo是百万分之三点四,即达到99.99966%的合格率,那么这就叫六西格玛。 6个西格玛＝3.4失误/百万机会― ...

dpu、dpo 和 dpmo 是用于表示您产品或过程的性能的指标，其基于缺陷数量。 选择适当的质量度量有助于针对客户期望评估性能。 您还可以设计项目基准和改进目标，以及向客户传达一致水平。

2013年6月25日 · DPMO（即：每百万次采样数的缺陷率）是指100万个机会里面,出现缺陷的机会是多少。这里有一个计算公式,即DPMO=（总的缺陷数/机会）×一百万分之一百万。 DPMO的概念由IPC-7912 Calculation of DPMO and Manufacturing Indices for Printed Board Assemblies 提出。

To calculate Defects per Million Opportunities (DPMO), follow these steps: Tally the total number of defects detected. Count the total number of units inspected. Establish the number of defect opportunities per unit. Use the DPMO formula: DPMO = (1,000,000 × number of defects) / (number of units × defect opportunities per unit)

DPU, DPO, and DPMO are metrics that express how your product or process is performing, based on the number of defects. Choosing the appropriate quality metric helps you assess performance against customer expectations. You can also develop project baselines and improvement goals, as well as communicate the level of conformance to your customers.

Definition of DPMO: DPMO represents the number of defects that could occur per million opportunities in any given process, thus providing a standardized measure for evaluating process performance and quality across different industries and scales of operation. Definition of ‘Defect’ and ‘Opportunity’: 1. Defect:

dpmo是重要的内部流程改善指标，也 六西格玛管理体系 关注的重点。 如果不能好好使用ppm…这些工具，对实际质量管控没有起到有效的作用，自己玩的再high，也是无用功。

2023年2月7日 · 五种最常见的测量方法是 每单位缺陷（dpu） 、 每百万次机会中的缺陷（dpmo） 、 每个机会中的缺陷数（dpo） 、 每百万个中的不良个数（dppm） ，以及 rty（直通率） 。