Mastery Level
This machine mastery will be unlocked at a certain level, unfortunately I don't know which level starts with this feature. So 1 week after the latest update I managed to get 2 stars on some of my machines. At first, my initial estimation on which of my machines will be the longest to reach 3 stars are the smelters since 2 star requirement already need 1540 hours (all 5 smelters combine). But I was wrong. I forgot the fact that my coffee kiosk is not always on 24 hour production queue unlike my smelters that are always producing 24/7. Furthermore my kiosk needs materials that I don't always have a surplus off. And the product itself varies from 5minutes to 30minutes max to produce. So actually the shorter the production time, the longer it takes to reach the level hour quota due to the lack of materials. In my estimation my coffee kiosk can take 2 months or even more, depending on how many I can make a day. Same like my Jeweler, is not always producing 24/7 since the material for it is not always available. Unlike my sugar mill that's producing 24/7 because I expand to max slot and always have the needed material to produce. I need 350hrs more to reach the final 3 stars. So in 2 weeks I will have 3 star sugar mill hehehe. Below is the list of level requirement of the machines. I lost my notes on the 1 star hour requirement database, so some might not be accurate. Please do correct me if you see an error. After few updates, the mastery level database finally complete.