A free mod for Mount & Blade II: Bannerlord, by TitaniumLithium.
TLWorkshopCurrentRatingMod is a mod for Mount & Blade II: Bannerlord that allows you to set a price for a particular input or output of a workshop. You can then rate the quality of a specific workshop based on how much money you think it is worth. This will allow you to choose which workshop to buy or sell your items.
As the name implies, this is a rating system, not a prediction one. It is based on how much profit you think you can make on a particular item.
It is based on the current prices of the inputs and outputs of a workshop. This means that it will change depending on the prices of the items you sell and buy. It is not based on how much you think it is worth to make a profit.
You can find the rating system under the "Show ratings of workshops" option in the "Town Menu".
