| Value | Category | 
|---|---|
| -9 | DON'T KNOW (SPONTANEOUS) | 
| -7 | DOESN'T APPLY (SPONTANEOUS) | 
| 1 | Problem was fixed but no further actions were taken | 
| 2 | Problem was fixed and actions were taken in order to ensure that it didn't happen again | 
| 3 | No action was taken | 
| 4 | There were no production process problems | 
| Sysmiss |