- Open the Snapshot Generation form. 
 
          - To determine when the calculation of the critical number is to begin, select an As Of Date value. 
 
          - Optionally, to add the snapshot to an existing list of critical numbers, select Append to Current Day. 
           
            If you do not select this check box, the new snapshot replaces any existing snapshots.
           
 
          - Click Process. 
 
         
         
          The application generates a "snapshot" value for the critical number. You can view it on the Critical Number Snapshots form.