1. A computer implemented method for providing information system management, comprising: obtaining a business ephemeris associated with a multi-layer mathematical model of an information system architecture of an enterprise, the business ephemeris having a predetermined lookup table cross referencing state of the information system architecture to remedy, the state being a plurality of data points associated with the mathematical model at a given time, the data points including quality of service, cost and throughput, the mathematical model including a business layer, an application layer and a technology layer; generating, from the business ephemeris, a set of cases relating to states of the mathematical model, the set of cases comprising characteristics, diagnosis and proposed solution for each state; matching a case of the set of cases to characteristics of the enterprise; and reporting a diagnosis and solution corresponding to the case.