An important goal of MIDAS was creating a repository for storing and managing the computerized models, model results, model parameters, and the specifications used to develop the models. The MREP was developed to house the code being developed by the MIDAS research groups into a professional, organized, and controlled environment. The guiding premise is that responding to an emergency requires a process that can be activated in a controlled, orchestrated manner; this premise also allows legacy code to be identified and past results reproduced.