| Clue | Source | Date |
|---|---|---|
| Worker has time for this amount of work (3-4) | ||
| Unit of labor | The Washington Post Sunday | 17 Mar 2019 |
| Productivity measure | Wall Street Journal | 23 Sep 2017 |
| Certain work unit | Universal | 17 Aug 2015 |
| Ergonomics unit | New York Times | 23 May 2015 |
| Ergonomics unit | ||
| Certain work unit | ||
| Industrial production unit | ||
| Unit of work | ||
| Unit of work | ||
| Unit of work | ||
| Unit of work. |