transport (1) spectacle (1) demande (offre et demande) (1) couverture (1) coût (1) sujet (1) Purchasing (1) Transportation (1) Relaxation (1) Purchasing (1) Performance (1) Integer programming (1) Experiments (1) Discount (1) Cost (1) Auctions (1) Algorithms (1) Addition (1) Transportation (1) Procurement (1) Number (1) Performance (1) Experiments (1)