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 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.