I'm finding that when I work on more than four knives at once I get sidetracked and end up with 10 to 12 knives in various levels of completion.
I do like to do things in steps though. When I get the bandsaw set of for metal I like to cut out as many blades as possible before putting a wood blade back on.
For heat treating I never want to work with more than 4 blades. I just can't keep up with more and heat treating is such a huge part of the process.
I do quite a bit of grinding pre heat treat on most blades. With .06 kitchen knife stock I only cut to shape and drill then heat treat prior to grinding. This is also true with some .08 stock.
I want to start making a much higher quality knife and I'm tempted to just work on one knife alone from start to finish and see if it turns out better when I devote all my time to it.
I'm pretty happy with the knives I've been making the past year, but I want to reach the next plateau...
I just counted and currently have a whopping 35 blades in work. This starts with blades that are just cut out and profile ground, to blades that are partially ground, and heat treated, to blades that are in the final stages of completion with scales on and awaiting polishing.
I'm not sure how I got myself here, but I have to concentrate on these and start working on a more manageable number...