A decision-support tool is provided to evaluate operational and financial performance for dispatchers in 
power grid control centers associated with utility systems. A scheduler engine is coupled to a comprehensive operating plan that applies after the fact analysis for performance 
metrics, root-cause impacts and process re-
engineering. A 
relational database is coupled to a data archiver that captures actual 
system and resource conditions and then supplies the 
system and resource conditions to the 
relational database. The scheduler engine receives the actual 
system and resource conditions from the 
relational database and processes it to calculate system performance. A 
user interface is configured to display at least one of, transmission evaluation application displays, reference and 
scenario cases and associations between them, results presented with a graphical or tabular displays, comparison results between 
scenario cases and a reference case, a family of curves where each curve is a performance metric, comparison of 
scenario input data, study results and 
statistical analysis and historical data.