In a system and method for managing mainframe computer usage, preferred values for service class defined performance goals are determined to optimize workload performance in service classes across a logical partition. The program instructs a computer to perform a process. Means for raising and lowering the well deck include hydraulic or pneumatic cylinders connected between the well deck and an overhead support. One or more of the seat pad modules is then coupled to one or more of the vehicle seat back and the vehicle seat base. The maneuvering lever includes a device for locking in the active blocking position.