|
Term
|
Definition
|
| CTQs | The short list of most important customer wants is called CTQs--Critical to Quality. |
| Customer | Any internal or external person / organization who receives the output of a process. |
| Customer Requirements | Defines the needs and expectations of the customer; translated into measurable terms, and used in the process to ensure compliance with customers' needs. |
| Defect | Any instance or occurrence where the product or service fails to meet customer requirements. |
| Defect opportunity | A type of potential defect on a unit of throughput (output), which is important to the customer. |
| DPMO | Acronym for "Defects per Million Opportunities." Calculation used in Six Sigma process improvement initiatives indicating the amount of defects in a process per one million opportunities. |
| Sigma | A statistical term that measures how much a process varies from perfection, based on the number of defects per million units. |
| Sigma levels | The sigma levels depict how much variation there is in your process and are represented as statistical values typically ranging from one to six. (Note: Sigma levels can theoretically be from zero to infinity and some companies have achieved a sigma level of 7 in some processes.) |
| Six Sigma | A level of process performance equivalent to producing only 3.4 defects for every one million opportunities. |
| Standard deviation | Standard deviation is a statistical measure of how much variation there is in a set of data. |
| Variation | Change or fluctuation of a specific characteristic, which determines how stable or predictable the process may be. |
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