Here's what I would test on flounce, if I was a flounce tester:
Is the gathering spread evenly along the seam?
Have all raw edges of the gathered piece been caught into the seam stitching?
Have basting threads (for establishing the gathering) been removed or are any visible on the right side of the finished seam?

Occupations dealing with these sorts of hard issues every day are unionized, guilded, and otherwise credentialed - I can see why they would have use for industry standards!

Putting the "Fiber" back in Fiberbabe...