*4.1. User Benefits*


In addition to the direct user's benefits, the "EDSS as a Service" paradigm also enabled the usage of legacy software in a modern service. Specifically, the CE-QUAL-W2 model has been developed, fine-tuned, and stabilized over the past 40 years. As an open-source project, it will be hard to finance the model redesign into a modern software design. This "EDSS as a Service" allows users to leverage the benefits of a modern web service along with its kernel of a well-established model. The developed infrastructure can also be used for fine-tuning the model calibration. Today, the modeler calibrating the CE-QUAL-W2 model needs to run the model multiple times while changing different tuning parameters. This is conducted to find the best match to the historic observed results in the field. This process is tedious and time-consuming, especially for long-running simulations. An algorithm similar to the grid search algorithm implemented for the YRA can be utilized to perform a parallel search for the best tuning parameters that maximize the goodness of fit between the observed and simulated results.
