Hello Caetano Almeida,
Great blog on the BADIs For MRP.
I will probably have to use the BADI suggested then.
"For a requirement changed or deleted, the existing planned orders will not be adjusted by MRP, that means, you may end up with more stock than it's actually necessary or planned order for which a requirement does not exist anymore."
The stakeholders are aware of the consequences of "firming them all." Their order cancellation rate is almost 0 and they sort of have a make to stock model which is very stable.