1. A method for diagnosing a system, comprising: obtaining a plurality of input parameters from the system, wherein the system generates actual values of one or more output parameters based on the plurality of input parameters; independently deriving values of the one or more output parameters, based on the plurality of input parameters, using a computational model; detecting a divergence between the derived values and the actual values; identifying respective desired statistical distributions of the plurality of input parameters, based on the actual values of the one or more output parameters, using the computational model; determining whether any of the plurality of input parameters is out of a predetermined input space prior to identifying the respective desired statistical distributions, wherein the input space is determined based on original desired statistical distributions of the plurality of input parameters of the computational model; and determining the derived values of the one or more output parameters inconclusive for identifying potential failures if any of the plurality of input parameters is out of the input space.