Abstract: In order to reduce operating system overhead and to reduce the amount of time that work is queued in a computer operating system environment, flexibility enhancements are made to initiator address spaces allowing them to be created, destroyed, assigned, reassigned and reclaimed. Furthermore, initiator structures are provided with tailorable features which allow them to be readily tuned and honed for computer work associated with the particular classes or groups of work. A method for deployment of initiator address spaces is provided so as to meet response time goals set by system programmers and/or managers. Additionally, system operators are freed from the chore of real-time initiator management.