The provision of Quality of Service (QoS) in Grid environments is still an open issue that needs attention from the research community. One way of contributing to the provision of QoS in Grids is by performing meta-scheduling of jobs in advance, that is, jobs are scheduled some time before they are actually executed. Therefore, it becomes more likely that the appropriate resources are available to run the job when needed, so that QoS requirements of jobs are met (i.e., jobs are finished within a deadline). This thesis presents a framework built on top of Globus and the GridWay...