This is about expanding the crafters ability to acquire new items to craft.
Clicking on a placed writing table in your settlement will bring up a list of your current crafters.
Lets choose a Carpenter!
This will bring up a list of available Items that your Carpenter can research - ex: Royal bed!
During your carpenters idle time he will travel to the writing table grab a feather, paper on the table, start scribbling in deep contemplation.
Maybe have the base chance for success start at 30% and add 10% for every level his “Mind” score is at (since current max is 6 this will = 90% chance to succeed).
*This will also Make you more choosy on who you choose to fulfill that job role.
Depending on how high of a tier the “Royal Bed” is at, can determine how long it takes for the carpenter to finish the research. Maybe The bed is a top tier item <random #> 5, so it will take them 5 in-game days to finish the research.
If the Carpenter does any crafting jobs during the research progress it will halt the research progression (Possibly have a progression bar next to the item your researching to show approx time how long it has left to finish).
This could also lead into a possible lvl progression - researching a certain amount of high-end items could increase your crafters level ex: increase work production, increase stamina , ect,.).
It could also go into Books/scrolls and others - You completed a quest, got a book for “Royal Bed Making” (increases research success rate by 5%) type of thing.
Just a Idea to help spark The Dev Teams creative juices