Glossary Terms Archive

Alias in Six Sigma: Definition, Alias Structure, and Design Resolution

In Six Sigma, an alias occurs in Design of Experiments (DOE) when two or more effects become indistinguishable from each other in a fractional factorial experiment. You cannot tell which factor, or which interaction between factors, caused the observed change in the...

Critical to Customer (CTC): Definition, CTC Tree, and CTC vs. CTQ

Critical to Customer (CTC) refers to the specific characteristics of a product or service that matter most directly to the customer, translated from raw Voice of the Customer (VOC) data such as surveys, interviews, and complaints. It matters because vague customer...

Defects Per Unit (DPU)

Table of contentsWhat are Defects Per Unit (DPU)?Benefits of Attending to DPUWhy is DPU Important?Related Articles: Estimated reading time: 4 minutes What are Defects Per Unit (DPU)? Defects per Unit (DPU) is a measure of process quality in Six Sigma that is used to...

Defects per Opportunity (DPO)

Defects per opportunity serves as one of the most powerful quality metrics in modern business operations. Organizations that master this measurement consistently deliver superior products and services while reducing costs and improving customer satisfaction. This...

DMEDI Explained: The Design for Six Sigma Roadmap for New Processes

DMEDI stands for Define, Measure, Explore, Develop, Implement, a five-phase Design for Six Sigma (DFSS) methodology used to design a new process, product, or service rather than improve an existing one. It matters because the standard Six Sigma roadmap, DMAIC, assumes...