The problem of output loss with continuous operation over time is an inherent feature of gas turbines. A part of this loss could be irrecoverable owing to mechanical reasons (aging), but rest of it is possible to recover with suitable operation/maintenance interventions. Output Loss Analysis (OLA) is a tool to identify the CCGT station output losses plant area wise & display these losses in real time in MW as well as in monetary terms enabling timely corrective actions to minimize them.