I was going through a brochure in brewing and it mentioned Single Turn, Double Turn and Triple turn brewing. However, it did not mention what those mean. I would really appreciate if anyone with knowledge of this enlighten me on this.
As far as I understand a "turn" is a term from Contract Brewing. Though it seems like it's slightly ambiguous term with different meanings depending on context. In this case it refers to a "turn" using the brewery and includes time in a fermentation vessel. Which is to say for $5000 you can use the facilities to brew 30 barrels of beer from start to finish, plus extra charges for ingredients and packaging (canning/bottling/kegging).
Internally brewers will also use "turn" as shorthand for "turnaround time" which only refers to how quickly a batch of beer can go from the grain mill to the fermentation vessel and is used for planning how many different batches of beer can be produced in a day.
I suppose it is turn = shift (meaning that they can pack up to 90bbls per day if the packaging department works 24 hours per day).