PowerDesigner provides default model checks to verify the validity of activity input and output parameters.
| 
                             Check  | 
                        
                             Description and Correction  | 
                    
|---|---|
| 
                             Input/output parameter name and code uniqueness  | 
                        
                             Activity input and output parameter names and codes must be unique in the namespace (model or package). Manual correction: Modify the duplicate name/code Automatic correction: Appends a number to the duplicate name/code  |