Glossary Terms Archive

Capability Analysis

Capability analysis is a method used to evaluate the performance of a process in terms of its ability to meet customer requirements or industry standards. It is commonly used in quality control and process improvement to evaluate the capability of a process to produce...

Process Capability in Six Sigma: Cp, Cpk, Pp, Ppk Formulas, Benchmarks, and DMAIC

Process capability measures how well a process performs within its specification limits. It is expressed using four indices: Cp, Cpk, Pp, and Ppk. Cp measures potential capability assuming perfect centering. Cpk measures actual capability accounting for how centered...

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)

Critical to Customer (CTC) is a term used in Six Sigma and process improvement methodologies to refer to the characteristics or attributes of a product or service that are most important to the customer. CTCs are the features or aspects of a product or service that...

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...