A method for manufacturing MTJ pillars for a MTJ memory device. A Fourier transform of signals emerging from the interferometer is obtained with magnitude values of the Fourier transform as a function of wavelength. Processes for presenting the plurality of components and receiving user input are handled by a first set of graphical objects, wherein in response to selected user input, a first event is generated. Abort steps that are conditioned on changes in the DCR are also included in the execution plan.