Classification algorithm optimization is described. A volume of the cap member is a volume of liquid sucked by the suction device in one suction operation or larger. The elements for replacement are selected by BOL testing at a selected operating point that maximizes the end-of-life yield distribution as among a set of operating points at which post-repair yield requirements are met at beginning-of-life. An area of the optical device that will prevent a function of the device is then masked, and sufficient energy is applied to the unmasked area to activate the optical blocking material of the unmasked area while leaving the masked area unactivated.