This thesis addresses a practical challenge encountered in the management of operating rooms within healthcare institutions. When dealing with the issue of scheduling a list of patients with varying surgery durations, an incorrect decision can result in significant time inefficiencies across the overall schedule, leading to a waste of resources that this work aims at minimizing. The problem of organizing tasks is well studied in the context of scheduling theory and the general idea is to search for a solution that satisfies all the requirements presented and at the same time minimizes a certain quantity indicating the quality of a solution.