1. A computer implemented application and infrastructure performance analysis and forecasting system, including at least a computer processor and a memory, the system improving performance of at least one application and infrastructure and reducing complexity of analyzing the performance of the application and infrastructure, the system comprising: a web dashboard for receiving infrastructure input from a user regarding application and infrastructure configuration and at least one performance objective using a user interface at a display device; a modeling engine for determining using the computer processor operatively connected with the web dashboard over a network, at least one application and infrastructure performance model based on the infrastructure input received from the user; a model input user interface at the display device for receiving model specific input from the user for the at least one application and infrastructure performance model; a model computation engine for computing using the computer processor operatively connected with the model input user interface over a network, output of the at least one application and infrastructure performance model based on the model specific input from the user and the at least one performance objective input by the user, wherein the output includes system parameters for modification to achieve the at least one performance objective; and a web dashboard for displaying the output of the at least one application and infrastructure performance model using a user interface at the display device.