Small, Medium and Large instances for GRASP parameter tuning

This dataset contains the problem instances used in the study for GRASP parameter tuning. Three Excel files are provided, corresponding to the Small, Medium, and Large problem sizes. Each file includes: Worker allocation: one sheet with the distribution of workers across the 15 shifts. Job data: for each instance, a sheet reporting the list of jobs, their assignment to Stage 1 machines, processing times, deadlines, and whether they require Stage 2 processing. Setup (changeover) matrices: for each machine in each instance, a sheet containing the corresponding setup-time matrix. Rows and columns are labeled with job IDs, and values represent integer setup times between jobs. These files provide the complete data used in the experiments, including all jobs, deadlines, worker allocations, and changeover times, allowing full reproducibility of the analyses.