1. A method of designing a thin film battery device and manufacturing the thin film battery device by determining at least one material property of at least one component of an electrochemical system using a process to reduce a difference of a performance characteristic between a numerical simulation result of a physical model and an empirical result, the method comprising: providing an electrochemical cell using a thin film process; performing a plurality of tests on the electrochemical cell, using a processor, to identify one or more target performance characteristics of the electrochemical cell, the plurality of tests including respective operational modes of the electrochemical cell; deriving a plurality of performance characteristics from the plurality of tests to provide a performance database, the performance database comprising the operational modes and the respective performance characteristics; performing a surrogate based analysis process; determining a plurality of outputs of the surrogate based analysis function; and determining a value of the unknown material property.