Hi Fernando,
Yes, you can change the settings in OBYC. replace Asset Account in OBYC with expense account.
Are you using Internal Order?
So when you issue stock, system will post following entry:
Expense Account with Order Dr---> This entry will show in KOB1
Stock Account Cr
Now when you do settlement you can maintain WIP Account in Settlement profile of your order and then it will post to WIP Account, the account entry will be as follows:
WIP Account Dr
Settlement Account Cr ---> This entry will also show in KOB1
Hope this helps!!!
Br, Vivek