System / Environmental Factors
Inadequate training / competency
Failure to follow SOP Communication breakdown
Fatigue / workload / stress Distraction / interruption Supervision / oversight
SOP unclear, outdated, or missing Equipment malfunction Reagent / supply issue LIS / IT system issue Workspace / environment / lighting Staffing levels / scheduling
Apply the 5-Why technique or fishbone analysis. State the root cause(s) - not the symptoms.