Hello. I am trying to model the brewing process of a local brewery. They have 8 different types of beer, 6-30 barrel fermentation tanks and 4-15 barrel fermentation tanks. Each "job" is 15 barrels, therefore if two "jobs" are the same type of beer, they may brew together in a 30 barrel tank. 15 barrel jobs can still brew in 30 barrel tanks, they just cant mix with an unlike entity. I am relatively to simio, so please if you can explain in simplified terms that would be good. I need to know how to make sure that only identical entities brew at the same time within a 30-barrel tank. If the beer already in the fermenter does not match the beer that is coming into the fermenter, then it needs to be blocked and sent to another open fermentation tank. Any help is greatly appreciated...same rules apply for 30-barrel brite tanks (the next step after the fermentation tanks)