The ambiguity and non-uniqueness of splitting fluxes and forces from the entropy generation equation raise confusion in nonequilibrium thermodynamics and misunderstanding of the Onsager reciprocal relationships. However, they provide an opportunity to select different sets of fluxes and forces that represent a given nonequilibrium process. By symmetrization of the phenomenological coefficient matrix, one can always find a proper set of fluxes and forces. This paper shows how the implementation of the transformation theory can produce several different sets of fluxes and forces through many engineering examples such as ideal gas permeation through a membrane, reverse osmosis, nanofiltration, ultrafiltration, and simultaneous heat and mass transfer. Also, guidance is presented on how to study nonequilibrium thermodynamics for a given irreversible process together with a short summary of the principles of nonequilibrium thermodynamics. These contain the entropy generation equation, linear relations of fluxes and all generalized forces including the Curie theorem, and the Onsager reciprocal relationships.