When a filter is added to a data set, it becomes a default view for the report viewer. A filter is a set view, meaning the viewer will not have the opportunity to change this setting at the run of the report.
A parameter is created when the report writer gives the viewer the option to change his/her view at the run of the report.
For example: I have added a date filter in Query Designer without checking the “Parameters” box. This is a filter, now this report is always run for Dec. 3, 2013 and cannot be changed by the user.
Now if I check the “Parameters” box the report runs for Dec. 3, 2013 by default, but will prompt the user with the option to run for a different date when they run the report.
If you have any questions about this feature or BI in general, please contact your Account Manager directly.