AbstractThis paper discusses a resource leveling problem in the maintenance turn-around of a drillship. The problem is that manpower resource requirements vary considerably during the maintenance period, resulting in increased downtime costs, labor idleness, hiring, and firing. In the first phase of the study, two simple heuristic algorithms have been developed for resource leveling. They are found to be effective. The second phase deals with the application of simulation to study the distribution of leveled resource requirement over the maintenance period. The study attempts to assist the maintenance personnel in improving manpower planning and control.