When you create a new defect for one of your assets you're able to select the "corrective type" using a drop down menu.
You can either use the example corrective types that are created by default for each company, or you can set up your own. To do so, you first go to the administration panel. Then, scroll down to the "Maintenance" section and click the "add" link to create a new corrective type, or "change" to modify an existing corrective type.
On the next page you can enter the name of the corrective type and save it using the save button on the right hand side of the page.
Examples of corrective types are: vandalism, accident, defect, derailment, etc.