2025-08-19

Reading Levey–Jennings charts with the whole bench, not only quality

Quality officers often keep Levey–Jennings charts in a binder the bench never opens. Drift after a reagent lot change then becomes a mystery discussed only after a clinician complaint.

A two-hour reading session with printed charts from the last month lets technologists mark lot changes, maintenance, and humidity spikes in the air-conditioned room. Those marks belong beside the points.

Westgard rules still apply. The session is not a lecture on statistics. It is a shared memory of what the instrument did last Tuesday.