If you have a parameter in your report that doesn’t necessarily exist in your report’s main object i.e. WORKORDER and that parameter is a logical one (better to setup it up as ALN) (e.g “Display Details? (Y/N)”), you can simply assign the value “yornlookuplist” to the ‘Lookup Name’ attribute of your parameter in the Report Administration application and inside your report you can handle the values ‘Y’ and ‘N’ as per your business requirement.
See print-screens below for setup and look & feel.


Read the following article for further support.