As organizations streamline operations to improve their competitive position or reduce costs, data center managers must identify and eliminate inefficiencies in the data center. The process of identifying and correcting processing inefficiencies in a data center is often referred to as tuning the data center. Though this process can be time-consuming, it can often result in a significant saving for the organization. For example, tuning a data center with a large mainframe could delay a hardware upgrade for six months to a year. However, the net result could be a saving of several million dollars. In many cases, EDP auditors are asked to look for ways to improve data center efficiency. This article explores how data center managers alone or with EDP auditors can eliminate processing inefficiencies by targeting potential weak spots and initiating corrective measures.