Field help (QUAFLG1) 

Submitted to control
Select the Quality control option
No control Non modifiable control: used to force the quality control in stock entry. Modifiable control: it is possible to change the status when entering the stock. For the last 2 cases, the initial entry status is "Q"
If the option of the general product is "Non modifiable control", this field has the same value and cannot be modified.