Filling a prescription requires dispensing the exact number of pills ordered. A manual or volumetric method — weighing a poured batch and dividing by the average pill weight, or a human counting quickly by hand — is prone to small errors that grow with order size and time pressure. A robotic system that vision-counts each pill through a singulation gate instead achieves essentially perfect accuracy at any batch size. Toggle between the two methods, dispense a series of randomized prescription orders, and watch the per-order outcome and running accuracy comparison build up.