We received the question below in our TapRooT® Root Cause Analysis Users & Friends Group on LinkedIn, please join the discussion with your experiences and best practices.

How would one do a SnapCharT® for intermittent product quality issues that span weeks/months?

The only way to detect the product impurity is to use the product. Even so, the impurity seems random in the same batch or lot, at different weeks or months, with different upstream raw material suppliers, with different personnel. Past root cause analysis was not systematic enough to find the rc. Fixes did not solve.