| FAILURES | FRACAS | AMFE |
| Hemolysed sample | 42 | 180 |
| Lack of sample | 42 | 126 |
| Misinterpreted internal controls | 42 | 72 |
| Clotted sample | 36 | 180 |
| Insufficient sample amount | 36 | 72 |
| Lack or inappropriate health training | 36 | 12 |
| Problems of method or analytical mode | 32 | 24 |
| Validation of the patient results without internal checking of the controls | 30 | 72 |
| Wrong sample container | 30 | 126 |
| Results not notified | 30 | 54 |