A thread break is easy to treat as a machine interruption: rethread the needle, back up a few stitches, and continue. That response is enough when the break is random. It becomes expensive when the same stop returns across a sample or bulk order. The useful question is not simply, “Why did the thread snap?” It is, “What did the break follow?” Some breaks follow a cone or needle. Others follow one machine head, one material, or one exact part of the stitch file. Reading that p