- if the pattern had a lot of fitting issues and I made it work, I save the mock up to use as a future pattern
- if it didn't work at all, it goes back in the fabric pile to be cut again as something else
- this one might be a little different than what other people do: if I think the pattern will work with only minor adjustments, I cut it in my lining fabric so I can just use it to line whatever I'm making once it's fitted. I baste the lining together, fit it, rip it apart to use as a pattern for the outside fabric, and put it back together.
- or, if the piece doesn't need a lining, I turn the mock-up into a garment on it's own. This can work since I mostly use plain sheets for my mock-ups. They take dye well if they have some cotton content so once that's done, no one knows the garment was just a trial run or is made from a sheet.
In this case, I went with the last option. When I made the Sims jeans for Eddy, I did a trial run to work out any kinks in my pattern alterations and sizing for his tiny self.