It has long been recognized in the electric power industry that to have a large-scale simulation of an electric grid that closely matches reality, you need to go through the process of calibrating the individual components of that grid. This process is referred to as power plant model validation (PPMV) and can be performed both with offline step tests and online performance monitoring of grid events. This task can be challenging, particularly when required by technical regulations, such as NERC Standard MOD-026. MathWorks tools complement engineering judgement with automated techniques, through a three-step process: 1. Gain deeper insight into response discrepancies through both voltage/frequency (VF) and active-power/reactive-power (PQ) replay. 2. Use engineering judgement and automated parameter sensitivity to assess and rank the influence of system parameters on system response. 3. Fine-tune your system response using both manual adjustments and automated parameter estimation.