| No | Word | Definition |
| 1 | Software Quality Assurance (SQA) | A set of activities designed to evaluate the process by which the products are developed or manufactured. Contrast with quality control. |
| 2 | Software volume measures. | Some density metrics use the number of lines of code while others apply function points. |
| 3 | Errors counted measures. | Some relate to the number of errors and others to the weighted number of errors. |
| 4 | Weighted measures | The measures that ascertain the severity of the errors are considered to provide more accurate evaluation of the error situation. |