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VitalS is a system or methodology for evaluating the health or state of a variety of systems. Important or critical components of a system are identified and assigned weights based on how critical they are. Data are collected for each of these parameters, and the resulting data are analyzed using the VitalS to produce an indication of the system’s health or state. Component problems are readily identified using this technique. Various examples of VitalS are given in this paper. Examples included are medical, automobile, and avionic systems. The discussions includes introduction, utility and application of VitalS.