Abstract (100 words or less): |  | A supply network consisting of a manufacturer and a number of suppliers is considered, where the manufacturer produces multiple products with uncertain demands and the suppliers offer both business volume discount and quantity discount schemes. A mixed integer nonlinear programming model is developed with the objective of maximizing the profit of the manufacturer under quality, delivery capacity, and production capacity constraints. A solution method based on GAMS and related solvers is presented to find optimal order quantities from selected vendors. |