Methodological steps used to develop a yardstick for data collection instruments
| Step one | Review of literature |
| Step two | Development of a desirable criterion for inclusion |
| Step three | Development of a standardised data collection form including standardised descriptions |
| Step four | Development of an information/instruction sheet |
| Step five | Validation of the yardstick by an expert panel |
| Step six | Testing of the yardstick by trained raters on a predetermined set of injuries |
| Step seven | Testing of the yardstick in situ |