Many runnability issues, such as brittle web breaks, are statistically rare even if they occur every day. This non-intuitive fact results because the problem area is very, very, very tiny compared to the non-problem area that ran successfully.
In the case of brittle web breaks, the problem may have started on a piece of contamination smaller than your finger nail or finger nail clipping after successfully running hundreds or thousands of acres of "good: web. Problems such as this require a very different approach than is typically found with process monitoring and testing and troubleshooting. See how to get started in these "run-and-hide" type problems below.
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