Wow. This has to be the most useless collection of replies I've ever seen on ENworld. Seriously.
With a couple of exceptions everyone is either so illiterate as to not understand that crafting skills are a central facet of the campaign he's running and therefore
not irrelevant, or suffering from a massive cranial-rectal inversion causeing them to chide Arravis for daring to have such a badwrongfun game.
What the holy hell? Why would you even post in this thread if you don't have a goddamm thing to contribute aside from an accusation of badwrongfun?
Arravis: Sounds like an awesome campaign man, and I would love to play in it.
If I understand correctly you're looking for 3 things from the skill system.
1) Can character A perform task B?
2) How well can character A perform task B?
3) How long did task B take?
As has been mentioned in a low tech setting like yours most people will be generalists, with specialists being those who work with rare or dangerous materials. So the 3 part skill system you suggest should work fine. As far as setting DCs goes I'd go with whatever the Standard DCs are in 4e with results something like:
Check result of DC-5 = Failure
Check result of DC-(4,1) = Shoddy Workmanship
Check result of DC to DC +5 = Normal Success
Check result of >DC+5 = Superior Workmanship
As far as how long it takes to make something, 4e isn't going to help you. I'd go with a couple on anthropology texts if I were you and use their results as guidelines. So makeing a stone knife or arrowhead might take 20 or 30 minutes while tanning leather takes days (but leaves you with a lot of free time during those days.)
You might use the feat system to allow access to crafting with unusual materials like metal or giant bug bile.
Alternately you can use the ritual system.
I'd call it the crafting system and default it to Rangers and Fighters, letting others pick it up with a feat.
Each item they want to craft is it's own 'ritual' which must be mastered in the same way as a ritual is. No book is needed however, and anyone can teach another a crafting ritual they know if they have access to crafting rituals. Usually masters charge for this training, although barter or exchange of rituals are commonplace.
E.G.
Craft Stone Blade
Level 1
Component Cost 5cp (of nice rock)
Category: Crafting
Market Price: 50 cp
Time: 20 min
Key Skill: Nature
Duration: Permanent
You chip a piece of suitable stone like flint, chert or obsidian into a form with a useable edge. This can be an arrowhead, a knife or an axehead.
But honestly, I don't think 4e has much to offer your game over 3e. Most of your reference document is useless or inapplicable in 4e. :\ Good Luck with your game though it sounds excellent.
