# Requirements Management

## How to Derive a Requirement

| ### What to do:
| Select Start > Requirements > Text Requirements. The Text Requirement mask is opened.
| Search for TRQ-900069 Transfer of Measures.
| Select the Structure tab.
| Click the Derive button. The Text Requirement mask is opened.
| Enter TRQ-900069_1 in the Requirement Number field and Input Length in the Name field.
| Click in the Source field and select Internal from the selection menu.
| Enter mm in the Content field.
| To save the entry click .
| Repeat steps 4 - 8 and enter the following values:
Requirement Number | Name | Source | Content
TRQ-900069_2 | Input Width | Internal | mm
TRQ-900069_3 | Input Depth | Internal | mm
| The relation is of type DRV (derived).