When you craft something, double the crafting period to “take a 10” on the crafting roll. You would increase from 2 hours to 4 hours per check for alchemy, or double the number of weeks total for crafting magic items. "Taking 10" means that your crafting checks are 10 + your related ability score + your related **tool** [[proficiency bonus]]. This provides a floor level that you can always succeed on if you choose to take your time. **If someone with proficiency is aiding you for the entire duration of the crafting**, the crafting check doesn’t gain any bonus, but can be completed in the standard (non-doubled) time. #### NPC Crafting It should always be assumed that when NPCs are crafting, they take this option, and thus craft more slowly but reliably. The slap-dash speed crafting is largely the domain of the players, though at the GM’s discretion the players may convince a NPC to craft faster assuming the risk of their materials.