A procedure is provided by which a worker is able to alter his or her work schedule using a computer system. The worker accesses work shift positions that have been designated as being alterable and chooses one as a selected work shift position. That selection may also specify a wage at the worker is willing to be compensated for staffing the selected work shift position. The computer system determines whether the worker is qualified to perform the tasks associated with the selected work shift position. If qualified, the worker is scheduled into the selected work shift position. The computer system also may provide a mechanism by which two workers can trade previously scheduled work shift positions.