| PROCESSES | FAILURE MODES | NUMBER OF PRIORITY |
| Preanalytical | Incorrect temperature of sample transport | 252 |
| Clotted sample | 180 | |
| Hemolysed sample | 180 | |
| Difficulty of obtaining a sample. Sample obtained is not correct | 162 | |
| Wrong container drawn | 126 | |
| Analytical | Inappropriate use of equipment or incorrect maintenance | 210 |
| Incorrect validation of previous analytical results | 180 | |
| Failure in relation sample-diagnostic reactive (interferences, prozone effects, viscosity…) | 126 | |
| Wrong magnitude selected in the request | 108 | |
| Adverse environmental conditions | 108 | |
| Postanalytical | Misinterpreted results | 280 |
| Inadequate performance of the patient results | 280 | |
| Critical value not notified | 270 | |
| Alert value not recognized | 189 | |
| Entry error results | 180 | |
| Strategic | Management error of the corrective and improvement actions | 80 |
| Failures in the organization of the indicators in preanalytical processes | 40 | |
| Failures in the organization of the indicators in analytical processes | 40 | |
| Failures in the organization of the indicators in postanalytical processes | 40 | |
| Lines of responsibility are poorly-defined | 14 | |
| Support | Error or failures of staff competence | 14 |
| Failure of replacement of staff | 12 | |
| Failure of installation maintenance | 10 | |
| Failure of reagent delivery (outstanding stocks) | 7 | |
| Lack or inappropriate health training | 7 |