Navigate to ADMIN » Maintenance » Bonus Columns. Choose the type of bonus column you want to add e.g. Conflict Free to Part.

Give it a title, which is the name of the bonus column as it would display to the user, and a technical name. Also, choose the data type based on the data format you want to save.

Checking Searchable? This gives you the option to filter a relevant list based on the bonus column value e.g. isolating Conflict Free parts from the rest inside of the part screen.