At this point I work on one at a time, but I'm always sketching possible designs. I have a number of unfinished blades floating around at various stages, but odds are none of them except the one or two of the stainless ones will be finished. The stainless ones will wait till I have enough to make it worth sending them out. Some are very early work and pretty bad, but at least one is good enough as it sits to send out and probably one or two more are not so badly messed up I can't save them. Might be a bit different than originally planned but still a knife. 
The reason I work one at a time rather than batches is because I'm still learning a lot on each one. By doing one at a time I don't make the same mistake on several and THEN discover it was not the best way to do it. In concept I'm with the guys who profile a group, grind them, heat treat... To me that seems more efficient and probably will give more consistency if doing multiples of the same design. Once I get enough experience I'll probably do small groups of three or four.
The reason I work one at a time rather than batches is because I'm still learning a lot on each one. By doing one at a time I don't make the same mistake on several and THEN discover it was not the best way to do it. In concept I'm with the guys who profile a group, grind them, heat treat... To me that seems more efficient and probably will give more consistency if doing multiples of the same design. Once I get enough experience I'll probably do small groups of three or four.