 
                                                                                | Article ID: | iaor19981795 | 
| Country: | Italy | 
| Volume: | 26 | 
| Issue: | 77 | 
| Start Page Number: | 35 | 
| End Page Number: | 50 | 
| Publication Date: | Mar 1996 | 
| Journal: | Ricerca Operativa | 
| Authors: | Sforza A., Avella Pasquale | 
| Keywords: | optimization, location, programming: integer | 
Preprocessing plays a crucial role in solving combinatorial optimization problems. It can be realized through reduction tests which allow one to determine in advance the values that a set of variables will take in the optimal solution, so reducing the size of an instance.