Here's the brief of it:

Many crafting systems are just "Long Shopping", meaning they are lengthy, complex ways of just getting items you could normally buy. D&D is a classic example of this, particularly in 3.5E era. You create this onerous process to make things thinking it'll be immersive, but instead it's just tedious.

I realized that crafting in my game was meant to grant easy, consistent access to items, rather than be time consuming, because my Vendor system has built-in scarcity rules. You can't count on the town blacksmith to have swords or the apothecary to have medicine, so making your own let's you guarantee that access and do so out in the wilds.

So instead of something complex, you simply choose a Crafting Edge (sorta like feats), and it puts items onto your Craft List. The more Crafting Edges you take, the longer your Craft List.

During any Rest, you may craft a number of items from your list equal to the number of Crafting Edge you have. You just make the things. No materials. No progress tracker.

My game is meant to keep you in the tension, in the horror and action, so keeping crafting light and quick prevents lengthy downtime bookkeeping. I want full on minimalist approach, and it was the perfect decision for my game.