There are a few more factors involved..
Not only can the print fail during printing, but it can also fail during cleaning, and it can break during polishing.
Worse yet, it can be that the item "never" survives shipping.
There is a possiblilty that the team figures out that some model just never makes it to the customer in one peice.
Almost to a fault, the production teams will try as hard as they can to produce a model the first time. I had one model in particular that took them six reprints to get a working copy before they ever shipped it. I just received the model and thought "oh, cool.. let's open it for sale"
The production team had to tell me effectively "we got this to work once, but we can't risk doing it 6 times for one shippable print"
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I am a major proponent of the "printed before" flag (which actually sortof exists), but I think we also need to be told by the production team(s) when a model is particularly troublesome AFTER printing. We need to add some communication here.. the production team(s) need to know that we plan to offer a particular model for sale over and over again. There's a major difference between TEST prints, and "I want to sell 1000 of these".