# Requirements Management

## How to Assign a Text Requirement to a Paramter

| ### What to do:
| Select Start > Requirements > Parameters. The Parameter mask is opened.
| Search for PAR-900048.
| Select the Requirements tab.
| To change to insert mode click .
| Click in the Requirement Number field. The Text Requirements list is opened.
| Select TRQ-900103 Precision regarding length.
| Click in the Equation field. A select menu is opened.
| It shows several mathematical functions.
| Select equal or less.
| Enter 3 in the Value field.
| Click in the Unit field. A select menu is opened that shows units related to the base unit selected for this parameter.
| Select mm.
| To save the entry click .
| The +/- column can contain any values when the circa equation is selected!