A capacity planning methodology

USAGE is an orderly procedure that starts by measuring an existing system. Like any effective management process, this should be an ongoing process. Projections should be tracked and rewordked periodically. The results of a study are useful for planning purposes, and as in any good management procedure, projections should be checked against reality. In capacity planning with USAGE, the results should be tracked against measured data. Discrepancies should be analyzed so that later projections can be made more accurately. The information should be fed back to the personnel who forecast growth rates, so that their understanding of the relationship between their portion of the business and the data processing installation can be updated and their future forecasts can be more accurate.