Six Sigma Defect Metrics

In this tutorial, we will learn about Six Sigma Defect metrics. Six Sigma is a methodology aimed at improving processes by identifying and removing causes of defects and minimizing variability. One of the key aspects of Six Sigma is measuring defects and process performance using a specific set of metrics. The defect metrics in Six Sigma are typically used to quantify the number of defects in a process and assess the process quality.

Six Sigma Metrics

Some of the defect metrics are as follows:

• Proportion Defective
• Yield
• DPU(Defects Per Unit)
• DPO(Defects Per Opportunity)
• DPMO(Defects Per Million Opportunities)

Proportion Defective (p)

Proportion Defective(p) = Number Of Defective Units / Total Number of Production Units

Yield

Yield  = (Total Number of Product Units – Number Of Defective Units )/ Total Number of Production Units

or

Yield(Y) = 1 – p

Defects Per Unit( DPU)

Defects per unit(DPU)= Total Number Of Defective Units/ Total Number Of Production Units

Defects Per Opportunity(DPO)

Defects Per Opportunity(DPO) = Total Number Of Defective Units / (Total Number Of Production Units *  Number Of  Defect Opportunities Per Unit)

Defects Per Million Opportunities (DPMO)

Defects Per Million Opportunities(DPMO) = DPO * 1,000,000

 

That’s it. We have successfully learned about Six Sigma Defect metrics.