Methods and apparatus are provided for a model-based diagnostic interface. An apparatus is provided for a diagnostic interface for a system having system data, system information, and a system model having a model nomenclature, the diagnostic interface comprising at least one computational object producing an output responsive to said system data, wherein said at least one object includes a binding of said system data to said system information, wherein said system data is mapped to said model nomenclature before being bound. A method is provided for making a model-based diagnostic interface for a system having system information and system data representing the status of said system, the method comprising the steps of modeling said system to create a system model having a system model nomenclature, mapping said system data into said system model nomenclature, and binding said system data mapped to said system model nomenclature to said system information.