The Model Skip Rules Editor (Chapter 18) is available as part of the flood risk analysis (FRA) compute of HEC-WAT. The purpose of the Model Skip Rules Editor is to allow the user to define logical expressions (i.e.., if-then statements) of conditions when model computations will be skipped, or not performed, within an FRA compute. A performance metrics alternative should never be skipped, because some of the computed results may not be correct if the performance metrics alternative is skipped.