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, wherein the at least one application and infrastructure performance model is a user response time model; 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, at least one output of the at least one application and infrastructure performance model based on the model specific input from the user; and a web dashboard for displaying the at least one output of the at least one application and infrastructure performance model using a user interface at the display device.