GP means inefficient in the sense of cost. Paper ballots add costs. Partial manual audits / hand-counts add costs. Full audits / hand-counts add a lot of cost, and in particular hand-counts require a lot of staff in order to yield results on election night.
The costliest item is counting by hand, so... don't. Use ballot scanning and counting machines and then implement a timely partial manual audit to demonstrate that the BMDs and BSCDs functioned correctly.
The costliest item is counting by hand, so... don't. Use ballot scanning and counting machines and then implement a timely partial manual audit to demonstrate that the BMDs and BSCDs functioned correctly.