Instances for the Two-Dimensional Cutting Stock Problem with Usable Leftovers and Uncertainty in Demand
Full description of instances for the Two-Dimensional Cutting Stock Problem with Usable Leftovers and Uncertainty in Demand (2D-CSPULUD). The 2D-CSPULUD was formulated as a two-stage stochastic problem. The first stage refers to the decisions made to meet a known deterministic demand, while the second stage determines the best cutting plan for a finite set of possible scenarios for the uncertain demand, adjusting the first stage decisions and optimizing the use of the generated usable leftovers. 16 classes of instances were defined with 'S' = 2 types of standard plates and varying the number of types of leftovers in stock ('R' = 1 and 2). The number of types of items varied with 'I' = 3, 5, 8 and 10, and their dimensions were generated according to the dimensions of the plates and leftovers in stock. For each class, 10 instances were generated.