Quality Managers
3346 Auburn Rd. #339
Auburn Hills, Michigan
48326
Tel. +1 248 283 0834
Fax. +1 303 942 4112
Quality Management Terms
| Term | Definition |
|---|---|
| Run chart | Also known as a line chart, or line graph. A chart that plots data over time, allowing you to identify trends and anomalies. |
| Sample | A subset of a population used to represent the population in statistical analysis. Samples are almost always random, which means that all individuals in the population are equally likely to be chosen for the sample. |
| Sample Standard Deviation Chart | Control chart in which the standard deviation of the subgroup is tracked to determine the variation within a process over time. Sample standard deviation charts are usually paired with average charts for complete analysis. |
| Scatterplot | A tool that studies the possible relationship between two variables expressed on the x-axis and y-axis of a graph. The direction and density of the points plotted will indicate various relationships or a lack of any relationship between the variables. |
| Seven Tools of Quality | Quality improvement tools that include the histogram, Pareto chart, check sheet, control chart, cause-and-effect diagram, flowchart, and scatter diagram. |
| Shewhart Cycle | Another name for the Plan-Do-Check-Act cycle. It is also sometimes called the Deming cycle. |
| Special Causes | Causes of variation in a process that are not inherent in the process itself but originate from circumstances that are out of the ordinary. Special causes are indicated by points that fall outside the limits of a control chart. |
| Specification Limit | An engineering or design requirement that must be met in order to produce a satisfactory product. |
| Statistical Process Control | Analysis and control of a process through the use of statistical techniques, particularly control charts. |
| Statistical Quality Control | Analysis and control of quality through the use of statistical techniques, essentially the same as SPC. |